短語(yǔ)詞組短語(yǔ)advancing and mining workface 采掘工作面advancing g mining 前進(jìn)式開(kāi)采longwall advancing mining mining 長(zhǎng)壁式開(kāi)采advancing coal mining 前進(jìn)式采煤longwall advancing mining workings 長(zhǎng)壁開(kāi)采法longwall advancing mining stoping 長(zhǎng)壁采礦法longwall advancing mining slicing 長(zhǎng)壁分層采礦longwall advancing mining retreating 長(zhǎng)壁后退式回采longwall advancing mining method 全面采礦法 返回 advancing mining