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Explosives and Explosive Ordnance Disposal
containing
马头门
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in specified order only
Chinese
English
马头门
又称“井筒与井底连接部”。井底车场巷道与立井井筒连接、断面逐渐的过渡段。按立井井筒的功能分为罐笼井马头门和回风井马头 n
ingate
马头门
掘进
井筒与井底车场连接处的掘进作业
shaft inset construction
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