Adopt the hydraulic retractable track chassis special for the rotary drilling rig, which meets the stability. ZTR150,ZTR200,ZTR230,ZTR260, ... .Adopt the hydraulic retractable track chassis special for the rotary drilling rig, which meets the stability and the convenience of the ... and motor of international famous company, which have big drilling torque and high work efficiency. - Install the infrared ...