pack hole 中文意思是什麼
pack hole
解釋
充填孔-
Recommended practice for gravel pack of sand control of the naked hole
裸眼井礫石充填防砂推薦作法 -
Before lighting the fuse, the hole was topped off with sand, and a three - foot - long, 1. 25 " diameter iron tamping rod was used to pack down the gunpowder
在點燃之前,洞的上部填滿了黃沙和一根長3英尺,直徑1 . 25寸的內置火藥的鐵棒。
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