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

无遮挡又黄又刺激又爽的视频| 日本欧美一区二区三区乱码| 亚洲av永久无码天堂网毛片| 国产午夜鲁丝片av无码| 99草草国产熟女视频在线| 免费女人高潮流视频在线观看| 青楼妓女禁脔道具调教sm| 小sao货水好多真紧h无码视频| 亚洲国产成人手机在线观看| 亚洲精品无码久久| 亚洲一区二区三区偷拍女厕| 99久久国语露脸精品国产色 | 无遮挡午夜男女xx00动态| 丰满少妇高潮惨叫久久久一| 中文字幕+乱码+中文字幕一区| 久热这里只有精品视频6| 日本精品啪啪一区二区三区| 亚洲国产精品一区二区久久hs| 国产精成人品日日拍夜夜免费| 人妻体内射精一区二区三四| 欧洲人免费视频网站在线| 女人下边被添全过视频的网址| 男女啪啪高清无遮挡免费| 亚洲日本va中文字幕久久| 国产精品无码专区在线观看| 午夜精品久久久久久久久久久久| 51国产偷自视频区视频| 无码国产精品一区二区app| 在线亚洲+欧美+日本专区| 无码写真精品永久福利在线| 亚洲精品一区国产| 久久草莓香蕉频线观| 亚洲女同一区二区| 亲嘴扒胸摸屁股激烈网站| 成人h动漫无码网站久久| 色哟哟国产精品免费观看| 亚洲—本道中文字幕东京热| 无码精品人妻一区二区三区影院| 无码专区狠狠躁天天躁| 无码人妻久久一区二区三区免费丨| 久久婷婷色香五月综合缴缴情|