... 激发点火系统 shot firing system 炮井 shot hole 爆炸井钻机 shot hole drill ...
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短语
炮井测井
uphole survey
炮井组合
pattern shot holes
炮井钻机
shot-hole rig
炮井套管
shothole casing
炮井药包
shothole charge
凿井炮眼组
sinking round
井下炮眼钻凿
underground blast hole drilling
凿井炮孔组
shaft sinking round