短語(yǔ)詞組短語(yǔ)surface coal mining 露天采煤surface hydraulic mining 露天礦水力開(kāi)采surface bench mining 露天臺(tái)階開(kāi)采surface e mining 露天開(kāi)采surface e mining method 露天采礦法surface mining method 露天采礦法;露天礦采礦方法surface mining engineering design 露天采礦工程設(shè)計(jì)surface mining safety 露天采礦的安全surface mining limits design 露天礦開(kāi)采境界設(shè)計(jì) 返回 surface mining