bunch holes的意思|示意
美 / /
英 / /
束状炮孔
bunch holes相关短语
1、 bunch-holes 束状孔
2、 bunch-holes blasting 束状孔爆破
bunch holes相关例句
In the vertical - Parallel concentrated bunch - holes caving, the floor pillar caving is a new mining method.
垂直平行密集束 状 孔落矿有底柱崩落法是一种新的采矿方法.
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