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to phrases
overhand stoping
expl.
上向台阶式回采
在金属矿山广泛采用的采掘方法之一。即从巷道顶板开始,按台阶形状顺次采掘矿石的一种方法。上向台阶式回采,俗称仰挖台阶式回采和倒台阶式回采,有水平钻孔和垂直〈或有少许角度〉钻孔两种方式,也称上向式采矿法
tech.
上向梯段回采法
overhand stoping
:
3 phrases
in 1 subject
Explosives and Explosive Ordnance Disposal
3
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