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台阶工作面掘进法巷道或硐室掘进工作面呈台阶状推进的方法。有正台阶工作面掘进法〈heading and belt driving method〉和倒台阶工作面掘进法〈heading and overhand driving method〉之分
expl. belt-face driving method
台阶 工作面掘进法
: 2 phrases in 1 subject
Explosives and Explosive Ordnance Disposal2

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