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development blasting
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expl.
井巷掘进爆破
所谓井巷掘进,是指为开采矿体或煤层而进行的开挖立井、斜井或平巷的作业,为此而采用的爆破称为井巷掘进爆破
;
掘进爆破
;
开拓爆破
井巷、隧道等掘进工程中的爆破作业
tech.
井巷掘进爆破
development blasting
:
3 phrases
in 1 subject
Explosives and Explosive Ordnance Disposal
3
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