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扩槽巷道掘进爆破中,从掏槽孔响炮到周边孔爆破形成巷道轮廓为止，为一个爆破循环。位于掏槽孔和周边孔之间的一些炮孔，其主要作用是扩槽。即为扩大掏槽，逐步形成巷道开挖断面而实施的中间爆破
expl. round
扩槽巷道掘进爆破中，从掏槽孔响炮到周边孔爆破形成巷道轮廓为止，为一个爆破循环。位于掏槽孔和周边孔之间的一些炮孔,其主要作用是扩槽。即为扩大掏槽，逐步形成巷道开挖断面而实施的中间爆破
expl. easer shot
扩槽: 34 phrases in 12 subjects
Aviation1
Drilling1
Electronics3
Explosives and Explosive Ordnance Disposal3
Hydroelectric power stations2
Information technology4
Multimedia1
Oil / petroleum4
Project management2
Technology10
Telecommunications2
Textile industry1

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