单词：pin hole
pin hole的用法和样例：
例句
- 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。
- It is reckoned that the organic volatimatter and residual water in the insulating board are the main reason arousing the skin hole.认为中间包绝热板村中的有机挥发物和残余水分是铸坯产生皮下气泡的主要原因。
- Geach says the blobs could represent a phase in galaxy evolution when the black hole at the center exerts a brake on the growing host galaxy.吉奇称，这些气泡可能代表了星系演化的一个阶段，当时中心的黑洞对不断发展的寄主星系起到了一种阻碍作用。
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