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冲击凿岩
eng.geol. percussion drilling
expl. impacts. drilling
冲击凿岩用冲击破碎岩石的方法在岩石上钻凿出炮孔的技术
expl. percussive drilling; percussion drilling
冲击凿岩: 30 phrases in 5 subjects
Bridge construction1
Earth sciences1
Engineering geology5
Explosives and Explosive Ordnance Disposal4
Technology19

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