... strong torque,high drilling efficency 3)trailer type CJW130 hydraulic water well drilling rig Application scope 1,Used for general ... and blast-hole drilling etc. 2,With hydro-automatic feeding device, and high drilling efficiency. 3,Designed with hydro-chucking unit ... reliable operations. 5, Compact in structure. All the drill, water pump and diesel engine installed on one base frame result ...