97超碰caoporen公开人人爽_国产美女一区二区三区在线观看_九一黄色片_日本一区免费在线_精品国产一区二区国模嫣然_日韩精品亚洲Aⅴ在线影院

With the development of science and technology, the use of high-frequency, RF connectors is more and more, and the interference of external electric field and consumption of my problem is also more and more attention, low dielectric constant materials into people's vision, such as rubber, PTFE, FVMQ, PEI and other materials, due to its own low wettability make it more difficult to stick with metal needle, The plasma treatment technology can increase the surface wettability, roughness and bonding properties without affecting the original properties of the matrix.