印制板的邮票孔是很普通的加工方法，但金属化邮票孔就不常见了。

The stamp hole on PWB is very common, but the PTH stamp hole is unusual.

youdao

印制板的邮票孔是很普通的加工方法，但金属化邮票孔就不常见了。

The stamp hole on PWB is very common, but the PTH stamp hole is unusual.

youdao