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Coromant cut
gen.
科罗门脱型掏槽
expl.
克罗曼特掏槽
克罗曼特掏槽是从直孔掏槽演变而来的一种爆破掏槽形式。直孔掏槽必须钻平行炮孔,但是使用小的轻型凿岩机钻凿平行炮孔非常困难。克罗曼特掏槽是在中心钻凿两个相交的大孔〈直径100mm〉作为自由面,再爆中心孔周围的其他炮孔
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