long face mining

基本解释长工祖开采

网络释义

1)long face mining,长工祖开采2)long face system,长工祖开采法3)hand won face,手工开采工祖4)longwall face development,长壁工祖升采5)continuous face mining,连续工祖开采6)main ends,旨备开采工祖