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非许用炸药
不允许在有可燃气〈和煤尘〉爆炸危险的煤矿井下工作面或其他工作地点使用的炸药
expl.
non-permissible explosives
非许 用 炸药:
9 phrases
in 1 subject
Explosives and Explosive Ordnance Disposal
9
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