shaft boring meaning in Chinese

竖井钻进

Spring retaining rings . axially mounted circlips for shafts bores
弹簧限位环.轴孔的轴向安装挡圈
Safety of unshielded tunnel boring machines and rodless shaft boring machines for rock
钻岩石用无护板的隧道掘进机和无杆轴掘进机的安全性
Safety of unshielded tunnel boring machines and rodless shaft boring machines for rock
钻岩石用无掩蔽的隧道掘进设备和无杆轴钻进设备的安全性
Safety of unshielded tunnel boring machines and rodless shaft boring machines for rock ; german version en 815 : 1996 a1 : 2005
岩石用无防护隧道钻机和无杆钻井机安全
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