成av人片一区二区三区久久,伊人久久大香线蕉av一区二区,韩国无码色视频在线观看,精品h动漫无遮挡在线看中文

SCIENTIFIC RESEARCH
Research Achievement

"Scientific research and innovation, layout of the future" is the foundation of Zhongshi in the first place in the industry and the expansion of territory. Since its establishment, Zhongshi has continuously attracted outstanding scientific research talents, created a research and development elite team led by doctoral supervisors and complete levels, and equipped with high-end research and development laboratories, so that Zhongshi products from research and development to demonstration testing, and then to batch listing to form a scientific and rigorous management system. At the same time, Zhongshi has achieved fruitful scientific research results, contributed a number of important patented products to the industry, and is a national standard drafting unit.

The invention relates to a silver-plated palladium alloy microsphere conductive adhesive and a preparation method thereof

Patent Number: CN200810180480.9

A high reliability low temperature lead-free solder paste and its preparation method

Patent Number: CN201610276455.5

A water-based cleaning agent can reduce the emission of pollutants in the cleaning of circuit boards

Patent Number: CN201410158283.2

A cleaning agent that can remove frosty residue from circuit boards

Patent Number: CN201410156472.6

A water-based soldering flux that can reduce the emission of pollutants during tin welding

Patent Number: CN201310238354.5

A solid flux with cored solder wire that reduces flight

Patent Number: CN201310239732.1

?

A halogen-free flux for lead-free solder paste and its preparation method

Patent Number: CN201210574561.3

A multicomponent eutectic lead-free solder of Sn-Zn-Bi and its preparation method

Patent Number: CN201210018765.9

A water cleaning flux for lead-free soldering and its preparation method

Patent Number: CN200910148739.6

A copper surface protectant for lead-free printed circuit board and its preparation method

Patent Number: CN200910131311.0

A water-based no-clean flux with no volatile organic compounds, no halogen and low solid content

Patent Number: CN200610078040.3

在办公室被c到呻吟的动态图| 国产乡下妇女做爰| 国产午夜三级一区二区三| 成人aⅴ综合视频国产| 色欲av无码一区二区三区| 欧美z0zo人禽交免费观看99| 日本va在线视频播放| 一区二区三区高清视频一| 亚洲熟妇无码av在线播放| 久久精品国产免费观看| 亚洲av无码乱码精品国产| 久久亚洲国产成人精品性色 | 国产成年无码久久久免费| 午夜肉伦伦影院| 亚洲国产欧美日本视频| 国产精品久久久久久久久久直播| 男人边吃奶边做好爽视频| 人妻精品久久久久中文字幕| 九九热爱视频精品视频| 成人免费看吃奶视频网站| 久久99精品久久久久久水蜜桃| 性无码专区无码| 国产成人av一区二区三区在线| 亚洲午夜无码极品久久| 亚洲精品一区中文字幕乱码| 国产精品系列无码专区| 国产偷国产偷亚洲清高动态图| 精品人妻av区波多野结衣| 永久免费观看国产裸体美女| 人妻少妇久久久久久97人妻| 毛片24种姿势无遮无拦| 精品国偷自产在线视频99| 女的被弄到高潮娇喘喷水视频| 国产亚洲成av片在线观看| 国产麻花豆剧传媒精品mv在线 | 夜夜爽妓女8888888视频 | 性做久久久久久免费观看| 美女粉嫩饱满的一线天mp4 | 日本一区二区在线高清观看| 日本护士毛茸茸| 亚洲精品成人久久电影网|