The hydraulic elements of ZT-1500 Directional Drilling Rig (including hydro pump, motor, Pressure valves, oil hoses etc ... .) The hydraulic elements of ZT-1500 Directional Drilling Rig (including hydro pump, motor, Pressure valves, oil hoses etc.) ... efficiency. 3T hydraulic hoist arm accreted the Drilling Machine, and is convenient for engineering, also, it is suitable for the installation ...