• <tr id="yyy80"></tr>
  • <sup id="yyy80"></sup>
  • <tfoot id="yyy80"><noscript id="yyy80"></noscript></tfoot>
  • 99热精品在线国产_美女午夜性视频免费_国产精品国产高清国产av_av欧美777_自拍偷自拍亚洲精品老妇_亚洲熟女精品中文字幕_www日本黄色视频网_国产精品野战在线观看 ?

    Opening and Sharing of Large-scale Instruments and Equipment in Agricultural Research Institutes: A Case Study of Environment and Plant Protection Institute of Chinese Academy of Tropical Agricultural Sciences

    2020-12-25 13:04:52YanmeiCUIXiaoqiangCHUHuapingHUANGXinchunZHANGYeLIShuchangWANG
    Asian Agricultural Research 2020年12期

    Yanmei CUI, Xiaoqiang CHU, Huaping HUANG, Xinchun ZHANG, Ye LI, Shuchang WANG

    Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; Key Laboratory of Integrated Pest Management on Tropical Crops, Ministry of Agriculture and Rural Affairs, Haikou 571101, China

    Abstract The article introduces the main practices and achievements of the Environment and Plant Protection Institute of Chinese Academy of Tropical Agricultural Sciences in promoting the sharing of large-scale instruments and equipment in recent years, analyzes the existing problems in the management system, management team, assessment incentives and maintenance guarantee, and proposes improvement measures and suggestions from aspects of improving the sharing management system, strengthening management team building, strengthening sharing assessment and incentives, improving maintenance capabilities and expanding external publicity, to further improve the sharing management of large-scale instruments and equipment.

    Key words Agricultural scientific research institution, Large-scale instrument and equipment, Opening and sharing, Existing problem, Suggestion

    1 Introduction

    Large-scale scientific instruments are the technical basis and important means for carrying out agricultural scientific research, exploring and discovering the laws of agricultural science, achieving breakthroughs in major key technologies, and serving agricultural development[1-2]. In recent years, as China’s investment in science and technology has continued to increase, the scale of scientific research facilities and instruments of agricultural scientific research institutions has continued to grow, and the technical level has been significantly improved. However, the problem of low utilization and low sharing level of large-scale instruments and equipment has gradually emerged at the same time. There are also many problems such as scattered resources, repeated purchases, closed management, inefficient use, and poor professional service capabilities[3]. Therefore, the State Council, the Ministry of Science and Technology, the Development and Reform Commission, the Ministry of Finance, the General Administration of Customs and other ministries and commissions and various local governments have successively introduced a series of related policies and management measures to promote the institutionalization of the opening and sharing of large-scale scientific research instruments and facilities, with a view to improving resource utilization and sharing level. In 2015, the State Council issued theOpinionsontheOpeningofNationalMajorScientificResearchInfrastructureandLarge-scaleScientificResearchInstrumentstotheSociety(Guo Fa[2014]No.70). It is required that scientific and technological resources such as major national scientific research infrastructure and large-scale scientific research instruments and equipment are accelerated to the society, the level of opening and sharing services is improved by strengthening the construction of opening and sharing mechanism, and the utilization of resources is further improved, making the opening and sharing work of large-scale scientific research equipment and facilities enter the stage of institutionalization[4]. In 2017, the Ministry of Science and Technology, the National Development and Reform Commission, and the Ministry of Finance jointly promulgated theAdministrativeMeasuresfortheOpeningandSharingofNationalMajorScientificResearchInfrastructureandLarge-scaleScientificResearchInstruments(Guo Ke Fa Ji[2017]No.289), which further regulated the opening and sharing management work of central-level research and development institutions and colleges and universities[5]. In 2018, the Ministry of Science and Technology and the Ministry of Finance jointly formulated theAdministrativeMeasuresfortheNationalScienceandTechnologyResourceSharingServicePlatform(Guo Ke Fa Ji[2018]No.48), to standardize the management of the national science and technology resource sharing service platform, promote the opening and sharing of science and technology resources to the society, and improve resource utilization efficiency[6]. In the same year, the Ministry of Science and Technology and the General Administration of Customs also formulated theAdministrativeMeasuresfortheOpeningandSharingofDuty-FreeImportedScientificResearchInstrumentsandEquipmentIncludedintheNationalNetworkManagementPlatform(Trial) (Guo Ke Fa Ji[2018]No.245) to promote the unified management of the inclusion in the national network management platform and the opening and sharing of duty-free imported scientific research instruments and equipment that enjoy the import tax policy of scientific and technological innovation[7]. In this article, taking the Environment and Plant Protection Institute of Chinese Academy of Tropical Agricultural Sciences as the example, the practices and achievements of implementing relevant national and local documents and promoting the sharing of large-scale instruments and equipment in recent years are introduced, the existing problems are analyzed, and suggestions for improvement are put forward, so as to provide reference for strengthening the sharing of large-scale equipment in agricultural research institutes.

    2 Main practices and achievements

    In order to implement theNationalMediumandLong-termScienceandTechnologyDevelopmentPlanOutline(2006-2020), the central treasury established the Special Fund for the Purchase and Repair of Central-level Scientific Institutions (hereinafter referred to as the “Special Fund for Repair and Purchase”). With the strong support of the central government and the Special Fund for Purchase and Repair, based on functional positioning and advantages and characteristics, focusing on the major demand for plant protection and environmental protection of agriculture in tropical areas, with the enhancement of technological innovation capabilities as the core, overall plans are made for technological innovation platform. By making full use of the investment channels such as the Special Fund for Purchase and Repair and basic construction and scientific research projects, in accordance with the principle of "sharing, opening and collaboration", a public laboratory and large-scale equipment sharing system with clear positioning and reasonable layout is established, thereby solidly promoting the construction of scientific research conditions and earnestly serving the main responsibility of scientific and technological innovation.

    2.1 Sharing goals and ideasSurrounding the goal of building a "first-class tropical environment and plant protection scientific and technological innovation center", based on the principle of "sharing, opening and collaboration", two basic sharing modes: "complete sharing within the institute" and "selective sharing within the academy, within the subject area and within the region" have been constructed. It has actively carried out co-construction and sharing exploration from multiple levels, including the unit, the unit’s relatively concentrated area, subject area, industry and department. A management system centered on the sharing mechanism has been established and improved. Large-scale instruments and equipment with sharing conditions are included into the sharing management system. On the basis of ensuring the full implementation of sharing within the Environmental and Plant Protection Institute, large-scale instruments are classified and shared in the whole academy and within the region.

    2.2 Sharing foundationThe existing equipment assets of the Environmental and Plant Protection Institute are more than 78 million yuan, and there are more than 3 000 sets of various instruments and equipment, including 134 sets of instruments and equipment above 100 000 yuan (worth more than 46 million yuan) and 21 sets of instruments and equipment above 500 000 yuan (worth 25.11 million yuan). During the Twelfth Five-Year Plan period, focus was placed on strengthening the construction of specialized laboratories. In order to meet the management needs of a large number of large-scale scientific research equipment purchased centrally and improve the level of service and sharing, open and shared public laboratories are established, including microscope laboratory, analysis and testing room, molecular biology laboratory, insect breeding room, tissue culture room, artificial climate chamber, sterilization and shaker room, environmental behavior laboratory and environmental toxicology laboratory.

    2.3 Sharing measures

    2.3.1Establishing a sharing center. In order to give full play to the benefits of instruments and equipment and improve equipment utilization, in accordance with the principle of "sharing, opening and coordination", the equipment sharing center of the Environment and Plant Protection Institute is established, and all existing instruments and equipment worth more than 50 000 yuan are included into the sharing center. There are management office and expert group under the sharing center. The management office is linked to the base and condition construction department. It is composed of director, deputy director and full-time management personnel. The expert group is composed of more than 20 experts who are proficient in various instruments and equipment in the institute. The large-scale instruments and equipment purchased from various channels are centralized in the open and shared laboratory, managed centralizedly and arranged unifiedly for use. At present, multiple technology platforms such as analysis and detection, microscopic observation, genomics, and proteomics have been built. A series of management systems, includingAdministrativeMeasuresforthePublicLaboratoryoftheEnvironmentandPlantProtectionInstitute,TheMeasuresfortheManagementofInstrumentsandEquipmentoftheEnvironmentandPlantProtectionInstitute,TheMeasuresfortheManagementoftheInstrumentsandEquipmentSharingCenteroftheEnvironmentandPlantProtectionInstitute,TheManagementStaffCompositionandManagementMeasuresfortheClassificationofInstrumentsandEquipmentintheSharingCenteroftheEnvironmentandPlantProtectionInstituteandManagementMeasuresfortheSharingofLarge-scaleInstrumentsandEquipmentoftheEnvironmentandPlantProtectionInstitute,ChineseAcademyofTropicalAgriculturalSciences(Trial) are formulated to standardize the management of the sharing center.

    2.3.2Establishing a network management platform. A large-scale equipment sharing center platform management website is established. According to the relevant information, instruments and equipment are included into the website, and subjected to classification and sharing. First, the instruments and equipment more than 50 000 yuan are shared on the sharing management system website to realize the sharing within the whole institute. Second, large-scale instruments and equipment of more than 200 000 yuan are included into the sharing network of the Chinese Academy of Tropical Agricultural Sciences and shared with brother units throughout the academy. Third, instruments and equipment worth more than 500 000 yuan are included into the Hainan Large-scale Scientific Instrument Collaboration and Sharing Network to realize sharing within the region. Managers register their personal accounts on the appointment platform of the large-scale instrument and equipment sharing center of the Chinese Academy of Tropical Agricultural Sciences and the instrument and equipment management system of the sharing center of the Environment and Plant Protection Institute, and through the sharing center platform, the technical indicators, main functions, service areas, charging standards and other information of the managed instruments and equipment are updated timely. An open plan is formulated. According to the appointment (manual appointment and online appointment), appointments are arranged to use in time, greatly facilitating the use of large-scale instruments by scientific and technical personnel inside and outside the institute.

    2.3.3Building a full-time and part-time management team. Five full-time managers responsible for the sharing of large-scale instruments and equipment throughout the institute are equipped. A classification management plan for large-scale instruments and equipment is developed. Large-scale instruments and equipment are divided into five types of professional equipment, including microscopic observation equipment, microbiology and molecular biology equipment, entomology research equipment, storage and preservation research equipment, and analysis and testing equipment. A full-time person in charge and 3-4 part-time equipment management experts are arranged for each type of equipment, further improving the utilization rate and use efficiency, strengthening the refined management, and giving full play to the role of large-scale instruments and equipment in scientific and technological innovation.

    2.3.4Carrying out use approval and computer operation certificate review. To ensure the normal operation and reduce the failure rate of the instruments and equipment, the use of all equipment is subject to approval procedure. The user makes an application and is allowed to use the instruments and equipment only after the approval of the management personnel and the conformance of independent operation. At the same time, according to the function and operating difficulty, the instruments and equipment are divided into three types: equipment with simple operation is operated independently by the applicant, equipment with more complicated operation is operated jointly by the applicant and management personnel, and large and precious precision instruments such as transmission electron microscopes are operated by the management personnel. After use, the user, use time and equipment operation information are recorded in the equipment use register in a timely manner.

    2.3.5Strengthening external relations. The sharing center establishes a large-scale equipment sharing center website, prepares various brochures such as large-scale equipment brochures, microscope center shared equipment brochures, instrument and equipment use technical manuals, and regularly holds equipment use training classes and experimental technology exchange seminars to provide various materials, information and technology exchange platforms for large-scale instruments and equipment to brother units in the academy, relevant universities, scientific research units and enterprises in Hainan Province. Thus, the visibility of the sharing center is increased, a large number of scientific and technological personnel of scientific research units, scientific research and enterprise units are attracted to come to use the instruments and equipment, and the use efficiency of the instruments and equipment is improved.

    2.4 Sharing effectThe establishment of the sharing center of the Environment and Plant Protection Institute has realized the dynamic management, promoted the shared use and improved the efficiency of the use of large-scale instruments and equipment, and effectively supported the external technological innovation service capabilities. Opening to the outside world has been quite effective in recent years. Among them, the sharing platform of microscopic observation equipment, dominated by transmission electron microscope and laser confocal microscope, has the most effective external sharing. In 2018 alone, the number of samples completed by the transmission electron microscope was 530, and the use time was 1 050.5 h. The ultrastructure of rubber leaves and somatic embryos, the ultrastructure of bougainvillea leaves, and the anther structure of cassava have been observed. More than 20 related papers have been published and 5 national patents have been applied. The sharing center provides technical support for the smooth scientific research carried out by relevant scientific research institutes or enterprises, promotes mutual communication and learning between units, increases the utilization rate of the instruments and equipment and achieves the goal of maximizing social benefits.

    3 Problems in sharing work

    A total of 21 sets of instruments have been incorporated into the national large-scale instrument sharing platform. The open rate reaches 100%, but the overall utilization rate is 65.0%, still lower than the national average of 72.3%[8]. In addition, the sharing management system needs to be improved, the scale and quality of the support team needs to be improved, the incentive responsibilities are not perfect, the professional service level needs to be improved, and the service and support role of large-scale instruments and equipment for scientific and technological innovation has not been fully brought into play.

    3.1 The sharing management mechanism needs to be improvedAlthough some sharing management systems and methods have been formulated to standardize the management of the sharing center, there are still some imperfections. First, a scientific and reasonable sharing fee system has not been established. The current charge is to account for the cost of reagents and consumables and utilities for the operation of shared instruments and equipment. This method only considers the direct cost of reagents and consumables, and indirect expenses such as maintenance fees for large-scale instruments and equipment, technical training fees for management personnel, and performance rewards have not been considered, nor have it clearly stipulated how the fees collected are used. Second, no intellectual property rights and confidentiality management systems have been established. The shared use logo is not clear. It is also unable to effectively protect user information and all intellectual property rights, data and technical secrets formed during use. Third, the management personnel introduction and training system is not sound. Affected by the existing personnel system and title system of scientific research institutes, the sharing center not only has no indicators for the introduction of professionals, and the existing management personnel are also affected in terms of salary and promotion.

    3.2 The number of managers is small and the quality is not high, and there is a lack of professional experimental technical personnelThe management of large-scale instruments and equipment requires a professional management team with rich experience, high level and certain stability[9]. In recent years, with the increase in the shared resources of scientific research equipment, the expansion of the scope of sharing and the deepening of the sharing level, higher requirements have been put forward on the number, professionalism, stability and management mode of the talent team. There are only 5 full-time management staff in the Environment and Plant Protection Institute. In addition to large-scale high-end equipment such as transmission electron microscope, which are managed by dedicated personnel, other equipment is managed by one person, or managed by part-time personnel. Basically, none of these managers have professional backgrounds related to instruments and equipment. Most of them are only familiar with the operation and use of the instruments and equipment. They are incapable of equipment maintenance and function expansion, let alone maintaining, repairing and giving full play to the effectiveness of the instruments and equipment[2].

    3.3 Incentives for managers are incompleteA management staff post evaluation mechanism has not been established and carried out in the sharing center of the Environment and Plant Protection Institute. As a result, managers’ work performance and performance goals are not clear, and their workload has no direct relationship with year-end appraisal and personal performance pay. Therefore, it is difficult to fully mobilize the enthusiasm of managers. In addition, under the existing professional title evaluation system, the professional title evaluation of full-time equipment management personnel is greatly affected, and it is difficult to have room for improvement, affecting the enthusiasm of managers and the stability of the management team. Furthermore, part-timers are not very enthusiastic about participating in sharing services due to lack of corresponding incentives and fear of affecting the progress of their scientific research projects.

    3.4 There is a lack of special funds for operation and maintenance of large-scale instruments and equipmentThe operation of instruments and equipment requires a certain maintenance cost. In particular, the maintenance cost of some large-scale instruments and equipment is higher. However, most of the existing national and provincial financial research projects at all levels only consider the direct expenditures such as the purchase of instruments and equipment and fuel and power, and do not consider the maintenance costs. Although the Environment and Plant Protection Institute has applied for some major facility operating fees through the Ministry of Agriculture and Rural Affairs, the proportion of expenses involved in the maintenance of instruments and equipment is very low. At the same time, a sharing charge system is adopted, but it only charges operating costs such as consumables and fuel and power fees. The above cost can only solve some small daily maintenance. Once the valuable parts are damaged, it cannot be solved in time and effectively, affecting the normal use and opening and sharing of large-scale instruments and equipment.

    4 Measures and suggestions

    Large-scale instruments and equipment have the characteristics of commonality and scarcity,etc. They are state-owned resources occupied and used by the units. Promoting the opening and sharing of large-scale instruments and equipment to the society can improve the utilization of large-scale instruments and equipment and fully release the service potential[10]. In the new situation, in order to fully guarantee the good operation and opening and sharing of large-scale instruments and equipment, combined with the aforementioned problems, improvement measures should be taken to improve the management system, strengthen the construction of the management team, strengthen the sharing assessment and rewards, improve maintenance and support capabilities, and strengthen publicity, to further improve the level of opening and sharing service capabilities and provide technical support for the construction of first-class scientific research institutes.

    4.1 Improving the sharing management system and improving the level of scientific managementFirst, a scientific and reasonable fee management system needs to be developed. According to the principle of cost compensation and non-profit, comprehensively considering the costs of materials, water and electricity, maintenance service fees, technical training fees, travel expenses, and expenses on rewards and performance management staff required for the operation and management of instruments and equipment, a charging and distribution system for paid services of shared instruments and equipment is developed. Second, intellectual property right and confidentiality management system needs to be formulated. The protection of user information and the rights and interests of intellectual property rights, scientific data and technical secrets formed in the process of use should be strengthened. The logo of sharing use is cleared. The rights and interests of large-scale instrument and equipment owners, users and service providers are cleared and effectively protected. Third, the existing talent introduction, training and management system should be reformed. The sharing center will be managed as a research unit in the institute. Preferential support will be provided to it in terms of talent introduction, training and use,etc. The same treatment shall be given to it in terms of professional title review, assessment and evaluation, and distribution of rewards.

    4.2 Strengthening management team building and improving professional service levelFirst, the training of existing personnel should be strengthened. Through professional skills training for management personnel in the use, repair and maintenance of large-scale instruments and equipment, selecting and sending personnel for further study in counterpart scientific research institutions and professional institutions at home and abroad and carrying out advanced business knowledge and laboratory management skills learning and foreign language learning, the professional skills and management level of existing managers will be improved continuously. Second, high-level professional and technical personnel are recommended to be introduced. By introducing talents with higher academic qualification and higher professional level, a technical team is set up around each large-scale instrument or equipment. While satisfying daily inspection service and maintenance management, new functions are utilized and explored constantly, and utilization of instruments and equipment is improved. Third, a professional maintenance team should be established. A capable maintenance service team should be established. Through measures such as training of knowledge and skills of equipment maintenance and repair for managers, the level of daily maintenance and repair will be improved continuously. On this basis, a technical service collaboration network is established with the maintenance forces of brother units in the institute and scientific research units outside the institute to continuously improve the ability and level of maintenance services. Fourth, cooperation and exchanges with universities and research institutes should be strengthened. By carrying out technical cooperation research and exchanges in related fields, the levels of sharing and opening, experimental technology, functional development and management and maintenance will be improved continuously[1].

    4.3 Strengthening sharing assessment and incentives to fully mobilize staff’s enthusiasm for workFirst, an instrument and equipment benefit evaluation, sharing assessment and incentive mechanism should be established. According to the classification of different equipment managers, the job responsibilities of managers are set. The indicators such as equipment usage time, sharing service status, function utilization and development, service revenue, equipment operation and maintenance status,etc. are evaluated comprehensively. Performance appraisal is carried out regularly, focusing on assessing the quantity and quality of services, and the results of the appraisal are linked with the evaluation results, reward performance and service income distribution[11]. Second, the enthusiasm of various management personnel needs to be fully mobilized. For full-time managers, their career development space can be broadened by opening up individual title review channel for instrument and equipment managers or establishing an "internal certification" type title promotion system. For part-time managers, scientific income distribution method is formulated. According to the quality and quantity of sharing services, corresponding rewards are given to stimulate the motivation of existing personnel and attract outstanding talents to participate[12-13]. Third, managers are encouraged to engage in relevant technological innovations. Support will be provided to management personnel for their declaring and undertaking related scientific research projects, undertaking horizontal service business, publishing academic papers and applying for patents and other scientific research activities. Same reward is given to scientific research personnel to enhance their sense of belonging and acquisition, and stimulate their enthusiasm for scientific and technological innovation in equipment management.

    4.4 Taking multiple measures simultaneously to improve maintenance and support capabilitiesFirst, special funds should be set up. At the national level, it is recommended to set up special funds for maintenance and repair of large-scale instruments and equipment. It may also stipulate that equipment operation and maintenance costs shall be separately listed in the direct funding of scientific research projects to ensure the normal operation of large-scale instruments and equipment and the orderly progress of opening and sharing work. At the local level, special funds for opening and sharing of large-scale instruments and equipment can be established. Appropriate proportions of test subsidies and operating subsidies are given to users and service providers who use shared instruments and equipment. It is also possible to issue scientific and technological innovation coupons and other measures to encourage local small, medium and micro enterprises and innovation teams to use the shared platform resources to carry out technological innovation. While stimulating the innovation vitality of small, medium and micro enterprises, the revenue of the sharing center will be increased[14]. Second, a shared fund should be established. Large-scale instrument and equipment management units can create rolling income fund from the paid fees obtained from the sharing services, mainly used for the operation, maintenance and updating of instruments and equipment. Part of it can also be used to reward the management personnel of the sharing center[12]. Third, existing policies can be utilize rationally. At present, indirect expenses are set in the funds of competitive scientific research projects at the national and local levels, mainly used for unit management indirect cost expenditure and undertaking project scientific research personnel performance expenditure. Therefore, a certain percentage of funds can be extracted from indirect costs for the operation and maintenance of large-scale instruments and equipment. Post-subsidy can also be applied in accordance with local policies such as theManagementMeasuresfortheCooperationandSharingPlatformofLarge-scaleScientificInstrumentsinHainan(Trial) for the operation, maintenance, repair, function development, upgrading and transformation of instruments and equipment and technical business training of personnel[15]. Fourth, internal payment channel should be opened up. Internal charging standards and procedures are formulated for equipment management units. The collection of operating and service fees for the internal laboratory testing services of the unit through individual capital account can be explored to improve the service efficiency of large-scale instruments and equipment[9].

    4.5 Strengthening external publicity and further expanding the scope of servicesFirst, propaganda can be carried out through multiple means. The sharing center and large-scale instruments and equipment are promoted through various means such as the sharing center website, QQ, WeChat public account, mobile APP, exhibition boards, brochures, large-scale equipment manuals,etc. to enable more scientific researchers to understand the large-scale equipment and related functions of the sharing center and attract more universities and research institutes in the region to come to use the equipment of the sharing center. Second, promotion can be carried out through multiple channels. Through the holding of large-scale equipment operation and use training courses, function presentations, technical academic exchange seminars,etc., the scope of the sharing services will be further expanded while improving the service ability of sharing center managers and the operation level of users. Third, encouragement should be carried out by multiple measures. By actively sending management personnel of the sharing center out to attend relevant academic conferences and providing incentives to managers and users to jointly apply for related scientific research projects, publish articles, and apply for patents, and encouraging managers to strengthen technical cooperation with relevant external scientific researchers the academic influence of the sharing center will be improved.

    草草在线视频免费看| 在线观看日韩欧美| 日韩欧美在线二视频| 9191精品国产免费久久| 老司机深夜福利视频在线观看| 色尼玛亚洲综合影院| 国产精品久久久久久久电影 | 香蕉久久夜色| 天堂av国产一区二区熟女人妻 | 久久婷婷成人综合色麻豆| 久久久精品国产亚洲av高清涩受| 久久这里只有精品19| 欧美国产日韩亚洲一区| 亚洲成av人片在线播放无| 熟女电影av网| 欧美日本亚洲视频在线播放| 久久久久久久久久黄片| 久久久国产精品麻豆| 舔av片在线| 国产成人精品久久二区二区91| 这个男人来自地球电影免费观看| 可以在线观看毛片的网站| 老鸭窝网址在线观看| 亚洲五月婷婷丁香| 亚洲人成伊人成综合网2020| 国产成人欧美在线观看| 欧美最黄视频在线播放免费| 成人国产一区最新在线观看| 久久中文字幕一级| 精品久久蜜臀av无| 老司机在亚洲福利影院| 男女做爰动态图高潮gif福利片| 日日干狠狠操夜夜爽| 首页视频小说图片口味搜索| 久久精品亚洲精品国产色婷小说| 欧美在线黄色| 欧美成人一区二区免费高清观看 | 麻豆一二三区av精品| 国产一区二区三区视频了| 少妇被粗大的猛进出69影院| 午夜福利视频1000在线观看| 日日夜夜操网爽| 人妻夜夜爽99麻豆av| 日本精品一区二区三区蜜桃| 成年人黄色毛片网站| 欧美大码av| 在线a可以看的网站| 色综合亚洲欧美另类图片| 久久亚洲真实| 国产在线精品亚洲第一网站| 日韩免费av在线播放| 亚洲熟妇中文字幕五十中出| 床上黄色一级片| 国产亚洲精品综合一区在线观看 | 欧美日韩黄片免| 全区人妻精品视频| 久热爱精品视频在线9| 天堂av国产一区二区熟女人妻 | 人妻夜夜爽99麻豆av| 国产精品久久久av美女十八| 美女黄网站色视频| 久久中文字幕一级| 在线观看免费日韩欧美大片| 又爽又黄无遮挡网站| 亚洲av成人精品一区久久| 特级一级黄色大片| 久久久久久人人人人人| 五月伊人婷婷丁香| 国产av不卡久久| 99国产精品一区二区蜜桃av| 18禁黄网站禁片午夜丰满| www.精华液| 人人妻人人看人人澡| 亚洲va日本ⅴa欧美va伊人久久| 国产激情偷乱视频一区二区| 国模一区二区三区四区视频 | or卡值多少钱| 久久久久久久精品吃奶| 欧美日韩福利视频一区二区| 欧美极品一区二区三区四区| 免费一级毛片在线播放高清视频| 欧美不卡视频在线免费观看 | 99热6这里只有精品| 中文字幕最新亚洲高清| 一本综合久久免费| 日本黄大片高清| 男女下面进入的视频免费午夜| 90打野战视频偷拍视频| 日本 欧美在线| 亚洲avbb在线观看| 国产一级毛片七仙女欲春2| 变态另类丝袜制服| 国内精品久久久久久久电影| 亚洲av五月六月丁香网| 老汉色av国产亚洲站长工具| 成年免费大片在线观看| 又紧又爽又黄一区二区| 露出奶头的视频| 桃色一区二区三区在线观看| av免费在线观看网站| 宅男免费午夜| 国产成人一区二区三区免费视频网站| 婷婷亚洲欧美| 亚洲精品美女久久av网站| 免费在线观看黄色视频的| 精品高清国产在线一区| 国产精品香港三级国产av潘金莲| 亚洲国产欧洲综合997久久,| 精品一区二区三区四区五区乱码| 免费一级毛片在线播放高清视频| 全区人妻精品视频| 国产精品1区2区在线观看.| 又爽又黄无遮挡网站| 久久久久性生活片| 欧美中文综合在线视频| 国产在线精品亚洲第一网站| 成人高潮视频无遮挡免费网站| 欧美三级亚洲精品| 久久精品夜夜夜夜夜久久蜜豆 | 久久精品综合一区二区三区| 欧美日韩亚洲综合一区二区三区_| 51午夜福利影视在线观看| 日韩高清综合在线| 可以免费在线观看a视频的电影网站| 黄色丝袜av网址大全| 一本综合久久免费| 黑人巨大精品欧美一区二区mp4| 国产精品久久久久久亚洲av鲁大| 精品人妻1区二区| 国产欧美日韩精品亚洲av| 男女床上黄色一级片免费看| 国产不卡一卡二| av在线播放免费不卡| 久久精品aⅴ一区二区三区四区| 他把我摸到了高潮在线观看| 露出奶头的视频| 国产av又大| 欧美一级毛片孕妇| 男男h啪啪无遮挡| 色哟哟哟哟哟哟| 18禁国产床啪视频网站| 一个人观看的视频www高清免费观看 | 少妇的丰满在线观看| 亚洲av电影不卡..在线观看| 精品午夜福利视频在线观看一区| 91老司机精品| 天堂影院成人在线观看| 精品久久久久久久久久免费视频| 亚洲精品av麻豆狂野| 老熟妇乱子伦视频在线观看| 日韩中文字幕欧美一区二区| 每晚都被弄得嗷嗷叫到高潮| 18禁观看日本| 午夜福利在线在线| 成人特级黄色片久久久久久久| 成人av一区二区三区在线看| 色综合亚洲欧美另类图片| 九色成人免费人妻av| a级毛片a级免费在线| 女警被强在线播放| 精品一区二区三区四区五区乱码| 日本五十路高清| 国产精品九九99| 男人的好看免费观看在线视频 | 欧美日本视频| 国产伦一二天堂av在线观看| 欧美激情久久久久久爽电影| 国产一级毛片七仙女欲春2| 精品乱码久久久久久99久播| 亚洲五月天丁香| 美女扒开内裤让男人捅视频| 欧美乱色亚洲激情| 女人高潮潮喷娇喘18禁视频| 九九热线精品视视频播放| 亚洲成a人片在线一区二区| 真人做人爱边吃奶动态| 亚洲最大成人中文| 日韩免费av在线播放| 男女下面进入的视频免费午夜| 天堂√8在线中文| 久久人妻福利社区极品人妻图片| 这个男人来自地球电影免费观看| 欧美日韩亚洲国产一区二区在线观看| 91老司机精品| 在线观看免费视频日本深夜| 精华霜和精华液先用哪个| 欧美日韩亚洲综合一区二区三区_| 久久这里只有精品19| 亚洲国产欧美网| 国产野战对白在线观看| 亚洲性夜色夜夜综合| 亚洲欧美日韩高清专用| 国产av一区在线观看免费| 两性午夜刺激爽爽歪歪视频在线观看 | 欧美绝顶高潮抽搐喷水| 日本黄大片高清| 亚洲成人中文字幕在线播放| 亚洲精品美女久久久久99蜜臀| or卡值多少钱| 丝袜人妻中文字幕| 国产aⅴ精品一区二区三区波| 亚洲欧美精品综合一区二区三区| www日本黄色视频网| 久久久国产精品麻豆| 又大又爽又粗| 老司机午夜福利在线观看视频| 国产午夜精品论理片| 麻豆久久精品国产亚洲av| 免费在线观看影片大全网站| 日韩欧美国产一区二区入口| 1024香蕉在线观看| 黄频高清免费视频| 精品欧美一区二区三区在线| 国产成人啪精品午夜网站| 久久久久精品国产欧美久久久| 亚洲国产精品合色在线| 午夜福利高清视频| АⅤ资源中文在线天堂| 国产欧美日韩一区二区精品| 国产探花在线观看一区二区| 亚洲 国产 在线| 99在线人妻在线中文字幕| 毛片女人毛片| 国内精品久久久久精免费| 9191精品国产免费久久| 在线a可以看的网站| 美女大奶头视频| 亚洲国产欧洲综合997久久,| 午夜福利在线观看吧| 国产精品亚洲av一区麻豆| 精品久久久久久久久久久久久| 国产精品1区2区在线观看.| 在线永久观看黄色视频| 亚洲五月婷婷丁香| 欧美最黄视频在线播放免费| 精品电影一区二区在线| 嫩草影院精品99| 女人被狂操c到高潮| 老熟妇乱子伦视频在线观看| 国产亚洲精品第一综合不卡| 国产av不卡久久| 亚洲人成77777在线视频| 亚洲黑人精品在线| 18禁黄网站禁片午夜丰满| 中文在线观看免费www的网站 | 日韩欧美三级三区| 免费看十八禁软件| 高潮久久久久久久久久久不卡| 人妻夜夜爽99麻豆av| 国产一区二区在线av高清观看| 狂野欧美白嫩少妇大欣赏| 在线国产一区二区在线| 亚洲欧美日韩无卡精品| 亚洲国产欧美一区二区综合| 精品久久久久久久久久久久久| 欧美三级亚洲精品| 亚洲av成人av| 久久久久九九精品影院| 成人三级做爰电影| 麻豆一二三区av精品| 亚洲av五月六月丁香网| 国产在线观看jvid| 欧美性猛交黑人性爽| 欧美日韩一级在线毛片| 中文字幕久久专区| 亚洲 国产 在线| 51午夜福利影视在线观看| 国产久久久一区二区三区| 女同久久另类99精品国产91| 亚洲国产欧洲综合997久久,| 18禁黄网站禁片午夜丰满| 国产精品电影一区二区三区| 此物有八面人人有两片| 国产高清视频在线观看网站| 禁无遮挡网站| 国产99久久九九免费精品| 97碰自拍视频| 亚洲aⅴ乱码一区二区在线播放 | 午夜福利高清视频| 国产私拍福利视频在线观看| 国产精品久久久久久人妻精品电影| 亚洲第一电影网av| 欧美精品亚洲一区二区| 精品乱码久久久久久99久播| 亚洲成人久久爱视频| 国产伦一二天堂av在线观看| 国产主播在线观看一区二区| 亚洲成av人片免费观看| 亚洲国产日韩欧美精品在线观看 | 午夜激情福利司机影院| 精品久久久久久久久久久久久| 亚洲午夜精品一区,二区,三区| 村上凉子中文字幕在线| 久久中文字幕人妻熟女| 久99久视频精品免费| 高清在线国产一区| 一区二区三区激情视频| 波多野结衣高清作品| 久久久精品国产亚洲av高清涩受| 99国产精品一区二区三区| 国产私拍福利视频在线观看| 别揉我奶头~嗯~啊~动态视频| 无限看片的www在线观看| 午夜a级毛片| 亚洲五月天丁香| 日韩欧美在线二视频| 天天一区二区日本电影三级| 午夜福利18| 婷婷六月久久综合丁香| 51午夜福利影视在线观看| 欧美3d第一页| 色老头精品视频在线观看| 国产精品av视频在线免费观看| 久久久久国内视频| 国产av麻豆久久久久久久| 日韩欧美精品v在线| 最近最新免费中文字幕在线| 国产探花在线观看一区二区| 老司机靠b影院| 九色成人免费人妻av| 亚洲av熟女| 在线观看午夜福利视频| 久久久久久久久中文| 美女午夜性视频免费| 久久精品成人免费网站| 国产成人精品久久二区二区免费| 男女下面进入的视频免费午夜| 亚洲欧美日韩高清专用| 色老头精品视频在线观看| 国产av一区二区精品久久| 后天国语完整版免费观看| 中文字幕高清在线视频| 国产av在哪里看| 午夜福利成人在线免费观看| 久久国产精品影院| 亚洲av片天天在线观看| 久久久久久人人人人人| 久久久久久国产a免费观看| 1024手机看黄色片| 国产激情欧美一区二区| 99国产极品粉嫩在线观看| or卡值多少钱| 欧洲精品卡2卡3卡4卡5卡区| 日本成人三级电影网站| 一个人免费在线观看的高清视频| 欧美成狂野欧美在线观看| 丁香六月欧美| 伊人久久大香线蕉亚洲五| 欧美成人性av电影在线观看| 制服人妻中文乱码| ponron亚洲| 中亚洲国语对白在线视频| 婷婷亚洲欧美| 中国美女看黄片| 国产精品98久久久久久宅男小说| 在线观看午夜福利视频| 亚洲国产精品合色在线| 亚洲国产欧美人成| 精品日产1卡2卡| 精品一区二区三区视频在线观看免费| 他把我摸到了高潮在线观看| 高清毛片免费观看视频网站| 亚洲精品av麻豆狂野| 亚洲精品一区av在线观看| 亚洲av电影在线进入| 日韩有码中文字幕| 真人做人爱边吃奶动态| 97人妻精品一区二区三区麻豆| 亚洲欧美一区二区三区黑人| 高清在线国产一区| 亚洲激情在线av| 法律面前人人平等表现在哪些方面| 亚洲精品在线观看二区| 男人的好看免费观看在线视频 | 成人国产一区最新在线观看| 长腿黑丝高跟| 一进一出抽搐动态| 白带黄色成豆腐渣| 亚洲精品美女久久av网站| 狂野欧美白嫩少妇大欣赏| 欧美高清成人免费视频www| 亚洲精品在线观看二区| 亚洲aⅴ乱码一区二区在线播放 | 黄色女人牲交| 精品无人区乱码1区二区| 欧美+亚洲+日韩+国产| 精品无人区乱码1区二区| 999久久久国产精品视频| 俺也久久电影网| 国产亚洲精品一区二区www| 日韩欧美三级三区| 国产欧美日韩一区二区精品| 日日爽夜夜爽网站| 色在线成人网| 国产精华一区二区三区| 99国产精品99久久久久| 成人国产一区最新在线观看| 国产精品 国内视频| 久久热在线av| 日本五十路高清| 桃红色精品国产亚洲av| 香蕉久久夜色| 中文字幕熟女人妻在线| 搡老熟女国产l中国老女人| 黄色视频不卡| 级片在线观看| 欧美在线黄色| 精品熟女少妇八av免费久了| 搡老熟女国产l中国老女人| 午夜福利18| 桃红色精品国产亚洲av| 女人爽到高潮嗷嗷叫在线视频| 国产成人系列免费观看| 免费看十八禁软件| 中文字幕高清在线视频| 亚洲美女视频黄频| 99精品久久久久人妻精品| 欧美不卡视频在线免费观看 | 久久这里只有精品中国| 国产精品久久久久久人妻精品电影| 国产激情偷乱视频一区二区| 欧美午夜高清在线| 老司机午夜福利在线观看视频| 老司机靠b影院| 久久精品国产清高在天天线| 90打野战视频偷拍视频| 午夜老司机福利片| 国产黄片美女视频| 国产精品日韩av在线免费观看| 中文字幕最新亚洲高清| 神马国产精品三级电影在线观看 | 国产精品一区二区免费欧美| 亚洲欧美日韩无卡精品| 成在线人永久免费视频| 欧美另类亚洲清纯唯美| 色老头精品视频在线观看| 亚洲av日韩精品久久久久久密| 国产69精品久久久久777片 | 亚洲国产欧美人成| 色哟哟哟哟哟哟| 岛国在线免费视频观看| 在线国产一区二区在线| 久久天堂一区二区三区四区| 国产成人av教育| 亚洲熟女毛片儿| 啪啪无遮挡十八禁网站| 成人永久免费在线观看视频| 久久久久久久久久黄片| 两个人看的免费小视频| 麻豆国产97在线/欧美 | 动漫黄色视频在线观看| 精品久久久久久久末码| 熟妇人妻久久中文字幕3abv| 亚洲精品粉嫩美女一区| 可以免费在线观看a视频的电影网站| 人妻夜夜爽99麻豆av| 欧美成人性av电影在线观看| 黑人操中国人逼视频| 宅男免费午夜| 免费在线观看成人毛片| 欧美日韩黄片免| 99国产精品一区二区蜜桃av| 又黄又粗又硬又大视频| 一边摸一边抽搐一进一小说| 日韩免费av在线播放| 亚洲成人久久爱视频| 999精品在线视频| 这个男人来自地球电影免费观看| 熟妇人妻久久中文字幕3abv| 床上黄色一级片| 国产久久久一区二区三区| 99久久久亚洲精品蜜臀av| 夜夜爽天天搞| 一区二区三区国产精品乱码| 变态另类丝袜制服| 久久伊人香网站| 国产精品久久久av美女十八| 亚洲人与动物交配视频| 在线观看www视频免费| 久久天躁狠狠躁夜夜2o2o| 精品国产亚洲在线| 亚洲免费av在线视频| 巨乳人妻的诱惑在线观看| 中出人妻视频一区二区| 18禁黄网站禁片免费观看直播| x7x7x7水蜜桃| 亚洲一区中文字幕在线| 久久精品综合一区二区三区| 美女扒开内裤让男人捅视频| 亚洲精品一区av在线观看| 国内精品久久久久久久电影| 精品国产亚洲在线| 国产成人精品无人区| 欧美日韩国产亚洲二区| 床上黄色一级片| 99精品在免费线老司机午夜| 1024香蕉在线观看| 国产人伦9x9x在线观看| a级毛片a级免费在线| 白带黄色成豆腐渣| 日韩av在线大香蕉| 老熟妇乱子伦视频在线观看| 在线观看美女被高潮喷水网站 | 欧美日韩亚洲综合一区二区三区_| 亚洲午夜理论影院| 久久中文看片网| 国产又黄又爽又无遮挡在线| 久久精品aⅴ一区二区三区四区| 成人三级做爰电影| 亚洲精品在线观看二区| 一进一出抽搐动态| 我的老师免费观看完整版| 午夜免费激情av| 一区二区三区激情视频| 亚洲精华国产精华精| 韩国av一区二区三区四区| 国内毛片毛片毛片毛片毛片| 啦啦啦韩国在线观看视频| 香蕉av资源在线| 99热这里只有精品一区 | 国产亚洲精品av在线| 深夜精品福利| 91大片在线观看| 国产免费av片在线观看野外av| 少妇的丰满在线观看| 亚洲美女黄片视频| av片东京热男人的天堂| 国产精品久久久人人做人人爽| 一区二区三区国产精品乱码| 久久天躁狠狠躁夜夜2o2o| 日韩欧美国产一区二区入口| 国产高清videossex| 亚洲18禁久久av| 精品久久久久久久久久免费视频| 国产精品免费一区二区三区在线| 欧美久久黑人一区二区| 男女做爰动态图高潮gif福利片| 色综合欧美亚洲国产小说| 美女免费视频网站| 日韩高清综合在线| 国产乱人伦免费视频| 男女之事视频高清在线观看| 91九色精品人成在线观看| 国产精品精品国产色婷婷| 天堂影院成人在线观看| 一进一出好大好爽视频| 在线播放国产精品三级| 国产欧美日韩一区二区三| 久久久久精品国产欧美久久久| avwww免费| 国产高清videossex| 老汉色av国产亚洲站长工具| 黑人欧美特级aaaaaa片| 一进一出好大好爽视频| 成人18禁在线播放| 久久婷婷人人爽人人干人人爱| 久久人妻av系列| 久久久久久国产a免费观看| 91在线观看av| 青草久久国产| 亚洲国产看品久久| 亚洲中文日韩欧美视频| 欧美在线一区亚洲| 在线a可以看的网站| 国产亚洲av嫩草精品影院| 精品福利观看| 91国产中文字幕| 黄色 视频免费看| 久99久视频精品免费| 在线观看免费视频日本深夜| 久久九九热精品免费| 亚洲av五月六月丁香网| 日韩高清综合在线| 亚洲 欧美 日韩 在线 免费| 欧美成人性av电影在线观看| 777久久人妻少妇嫩草av网站| 日本一二三区视频观看| 两个人的视频大全免费| 免费在线观看成人毛片| 中文字幕人成人乱码亚洲影| 成人三级黄色视频| 国产一区在线观看成人免费| 亚洲欧美精品综合久久99| 亚洲片人在线观看| 高清在线国产一区| 精品乱码久久久久久99久播| 最新美女视频免费是黄的| 午夜免费观看网址| 正在播放国产对白刺激| 久久精品国产清高在天天线| 高潮久久久久久久久久久不卡| 国产免费av片在线观看野外av| 日韩大尺度精品在线看网址| 男女视频在线观看网站免费 | 一个人免费在线观看电影 | 桃红色精品国产亚洲av| 国内少妇人妻偷人精品xxx网站 | 日本三级黄在线观看| 国产精品久久久久久精品电影| 九色国产91popny在线| 露出奶头的视频| 三级男女做爰猛烈吃奶摸视频| 免费在线观看黄色视频的| av在线播放免费不卡| 可以在线观看毛片的网站| 国产成人精品无人区| 我的老师免费观看完整版| 可以免费在线观看a视频的电影网站| 天天躁狠狠躁夜夜躁狠狠躁| 国产高清videossex| 日韩三级视频一区二区三区| 天天一区二区日本电影三级| 亚洲色图 男人天堂 中文字幕| 日韩欧美精品v在线| 亚洲在线自拍视频|