久久成人人人人精品欧,成人精品aaaa网站,国产成人网,国产www免费,国产三级在线视频一区二区三区,国产一区二区视频网站,九九99热久久精品66中文字幕

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;