mine roof support for longwall advancing
长壁煤柱回采工艺
longwall pillar working【矿】
暂无补充释义。
相关词条
face support (longwall working), wandering
powered frame support for longwall advancing
face support (longwall working)
longwall system【矿】;longwall workings【矿】
filling longwall method【矿】
mine roof suppo瞨t for longwall advancing
longwall-shortwall coal cutter