短语词组短语arm coal -cutter bar coal cutter 杆式截煤机chain coal -cutter 链式切煤机coal -cutter-loader 联合截煤机arm m coal -cutter 杆式截煤机coal cutter -loader 联合截煤机longwall -shortwall coal cutter 万能截煤机Screw -type coal cutter 螺旋式采煤机 返回 coal cutter