亚洲a级在线观看|夫妇交换性3中文字幕|在线看片网站,欧美激情狂野,91视频社区,精品电影一区二区三区

Application：

New-generation selective OSP refers to the product in particular designed for PCB surface coating and adapted to high-temperature lead-free assembly process, applies to full-copper board and copper-gold mixed board, with no film deposition on gold surface, and highly applies to the production of high-density and fine-spacing PCB.

Advantage introduction：