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钻孔速度
钻孔时钻头的线速度,或称之为凿岩速度。通常冲击式和旋转式钻孔时以 m/min 表示,而全断面钻进时则以 m/h 表示
expl.
penetration rate
钻孔速度
:
3 phrases
in 1 subject
Explosives and Explosive Ordnance Disposal
3
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