perforation
参考例句：
A combination of cushion blasting and line-drilling can be suitable
缓冲爆破和轮廓线钻眼法结合使用可能比较合适。
Match the balance marks carefully and complete by tapering the stitching past the drill hole in the usual way.
仔细地对准对位记号并用以往的方法完成。针迹逐渐变细经过钻眼即可。
perforation是什么意思：
n. 穿孔,贯穿,贯通
single-perforated grain
单孔药柱
This machine perforates the sheets of stamps.
这台机器在这整版邮票上面穿孔。
The broken ribs perforated into his lung.
折断的肋骨刺穿了他的肺。
The samples are collected in perforated polyethylene bags
样品采集在有孔的聚乙稀袋中。
One patient suffered a bowel perforation.
一位病人患了肠穿孔。