longwall mining
短語詞組
- longwall actual mining 走向長壁回采
- longwall advancing mining system 長壁采煤法
- longwall advancing mining stope 長壁式回采工作面
- longwall advancing mining workings 長壁開采法
- longwall shrinkage mining method 留礦全面法
- longwall advancing mining stoping 長壁采礦法
- longwall advancing mining slicing 長壁分層采礦
- longwall advancing mining retreating 長壁后退式回采
- longwall advancing mining mining 長壁式開采 返回 longwall mining