... vehicle. The transfer case, main drive system, gear box, double-winch, mud pump, turntable, drill tower, feeding tools are ... -125-315, 2BV5121 vacuum pump; BW850/20A reciprocate double-cylinder double-acting piston mud pump, controlled clutch combine or separate ... air lifting reverse circulation drilling with air-water used tap, double-wall drilling pipe, gas-water separator; can carry out Hydraulic ...