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前进式开采
tech. advance mining
前进式开采1. 自井筒或主平筒附近向井田边界方向依次开采各采区的开采顺序, 2. 采煤作业面背向采区运煤上山〈运煤大巷〉方向推进的开采顺序
expl. advancing mining
前进式开采
: 10 phrases in 1 subject
Technology10

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