教室超h高h污肉1v1调教师生_国产+女女+喷水_刺激战场两人浪漫视频_又色又爽又黄的视频软件app_(中字)上司人妻hd_人与性动交ⅹxxx喷水_51avi在线视频_噜噜吧噜噜色_丁香六月色婷婷狠狠爱_99精品国产在热久久婷婷

中文English

Service hotline:400-0539655

中文English
Factors affecting the number of drilled plates
分類：公司新聞 發(fā)布時間：2020-04-20 14:01:13 作者: 來源:
　Factors affecting the number of drilled plates
Factors affecting the number of drilled plates
Provision of the number of PCB drilling plates in and out
This is based on the process capability of each division. But related to a few factors
1) Thickness
2) The smallest drill
3) Required accuracy
4) Substrate type: The number of substrates is FR4 and CEM-3. The number of substrates is different. The same substrates have different Tg values.
5) In other cases, such as the slot length of the slot is less than twice the diameter of the drill.