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炮孔利用率 pàokǒng lìyònglǜ
expl. breaking shot; blast hole utilization
炮孔利用率爆破掘进的进尺与炮孔长度之比称为炮孔利用率。爆破效果较好的掘进爆破，其炮孔利用率可以达到95% pàokǒng lìyònglǜ
expl. blast hole utilization factor
炮孔利用率爆破掘进的进尺与炮孔长度之比称为炮孔利用率。爆破效果较好的掘进爆破,其炮孔利用率可以达到95% pàokǒng lìyònglǜ
expl. efficiency of borehole
炮孔利用率: 3 phrases in 1 subject
Explosives and Explosive Ordnance Disposal3

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