... control mode, which the main hydraulic pressure components are imported. Flow rate of the mud pump is 320L, it can meet the ... WD615Engine Type Turbo-charging, 4 strokes, 6 cylinders water coolingEngine Rate Power 154KW/2200 rpmDiameter of drill pipe 73 mmLength of ... m or 4 mDiameter of Back Reamer 220 - 940 mmMax Flow Rate of Mud Pump 320 L/minMax pressure of Mud Pump ...