longwall mining
短语词组
- longwall actual mining 走曏長壁廻採
- longwall advancing mining system 長壁採煤法
- longwall advancing mining stope 長壁式廻採工作麪
- longwall advancing mining workings 長壁開採法
- longwall shrinkage mining method 畱鑛全麪法
- longwall advancing mining stoping 長壁採鑛法
- longwall advancing mining slicing 長壁分層採鑛
- longwall advancing mining retreating 長壁後退式廻採
- longwall advancing mining mining 長壁式開採 返回 longwall mining