被女同桌调教成鞋袜奴脚奴,两个人的视频免费高清在线观看,国产精品成人无码久久久,亚洲色欲综合一区二区三区

En

中文
Experts team

Meet a team of experienced & knowledgeable professionals who make our customers pleased with their ability to create the best PMA products to improve performance of clients.

The produce and technical team members of our team are all doctors and masters graduated from chemistry major of key universities with more than 10 years’ experience in the development and application of lubricating oil and additives.

These team members are experts of enjoying the State Council allowance, senior engineers of professor level, senior engineers, etc., and we have also established long term cooperation of technical and application with these professional research institutes and important customers both of domestic and abroad.





Mr. Wang Zeen

Graduated from the Department of Chemistry of Lanzhou University.

Professor level senior engineer with nearly 40 years of experience in the development and application of lubricants and additives and production management.



Dr. Zhang Dongheng

Ph.D. of Polymer Chemistry and Physics in Chinese Academy Sciences Chemistry Institute.

Senior engineer, has nearly 20 years of experience in the development and application of lubricating oil additives and new lubricating materials.



Mr. Wei Guanwei

Master of Polymer chemistry and physics in Nankai University.

Senior engineer with 15 years of experience in the research, development and application of lubricant additives such as Viscosity Index Improver, pour point depressant, antirust, etc.





Mr. Kong Lingjie

Master of Chemistry in Fudan University.

Senior engineer with nearly 15 years of experience in the research, development and application of lubricant additives such as Viscosity Index Improver and pour point depressant.



Dr. Liu Gongde

Ph.D. of Polymer Science and Engineering in Sichuan University.

Senior engineer, received special government subsidies from The State Council.

Dr. Liu has nearly 30 years of experience in the development and application of lubricating oils and additives.





Dalian IOE New Material Development Co.,LTD @ 2020 all rights reserved HELPDESK:ADVERY
奇米精品视频一区二区三区| 99久久国产露脸精品国产麻豆| 亚洲日产乱码一二三区别| 久久99精品国产99久久6不卡| 久久这里只有精品青草| 精品成人A区在线观看| 国产乱码免费卡1卡二卡3| av无码久久久久不卡网站下载| 亚洲AV无码男人的天堂在线| 国产成人剧情AV麻豆果冻| 无码H黄肉3D动漫在线观看| 国产模特嫩模私拍视频在线| 日本中文字幕有码在线视频| 97精品依人久久久大香线蕉97| 在线精品免费视频无码的| 国产麻豆老师在线观看| 野外做受又硬又粗又大视频| 精品日产1区2卡三卡麻豆| 老少配老妇老熟女中文普通话| 国产AV老师黑色丝袜美腿| 又色又爽又黄的视频软件app| 狠狠躁天天躁无码中文字幕| 国产特级毛片AAAAAA视频| 天堂AV无码亚洲AV无码| 成年女人黄小视频| 无码成人aaaaa毛片| 午夜成人无码福利免费视频| 人妻色综合网站| 亚洲色AV天天天天天天| 亚洲国产成人久久精品尤物| 欧美日韩亚洲中文字幕二区| 久久99精品久久久久久久不卡| 男人扒开女人内裤强吻桶进去| 久久人人爽人人爽人人av| 蜜桃AV抽搐高潮一区二区| 精品无码av无码免费专区| 中文字幕无线观看不卡网站| 久久99精品久久久久久清纯| 国产亚洲3p无码一区二区| 熟妇乱子作爱视频大陆| 人人妻人人澡人人爽欧美一区|