A.上順槽 B.下順槽 C.工作面 D.運(yùn)輸大巷
A.0.1s~0.3s B.0.2s~0.4s C.0.5s~0.7s D.0.8s~1.0s
A.1倍 B.1.1倍 C.1.3倍 D.1.5倍