blacking hole

• 针孔,涂料气孔

blacking hole的用法和样例：

例句

1. Flux Corrosion is typified by pin hole leaks, generally in the bottom of a horizontal line.
   典型例子是由于针孔泄漏导致的焊剂侵蚀，通常发生在水平管道的底部。