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to phrases
凿岩速率在给定的岩石类型、钻机、钻头直径,以及风压和水压等条件下每个单位时间内达到的穿孔深度,单位为 m/min
expl. drilling rate
凿岩 速 率
: 3 phrases in 1 subject
Explosives and Explosive Ordnance Disposal3

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