平巷掘进 meaning in Chinese

drifting
entry driving
gallery driving
level cutting
tunnel heading

Entry driving machine
平巷掘进机
Tunnelling machines - road headers , continuous miners and impact rippers - safety requirements
隧道掘进机械.巷道掘进机联合采矿机和冲击式平巷掘进机.安全性要求
Safety of unshielded tunnel boring machines and rodless shaft boring machines for rock ; german version en 815 : 1996
无防护平巷掘进机和插入岩石的无钻杆竖井钻机的安全