色伊人婷婷,日日天日日夜日日摸,尹人在线观看视频,欧美国产视频一区二区,日韩激情视频一区二区,久草在线新首页,免费久久精品视频

The PEI profile is used for the test fixture accessories of semiconductor chips, due to the fact that the PEI material can still maintain a stable, excellent dielectric constant (as low as 3.15) and dielectric loss and extremely high in a wide temperature and frequency range. Dielectric strength;