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煤巷 méixiàng
tech. coal drift; coal road; coal roadway; gate road
煤巷在掘进断面中,煤层面积占全部或绝大部分〈一般大于4/5〉的巷道 méixiàng
expl. coal drift
煤 巷
: 23 phrases in 4 subjects
Earth sciences1
Explosives and Explosive Ordnance Disposal5
General4
Technology13