... years professional manufacture2. Certificate: ISO9001:2000 and ISO9001:20083. Export to: Africa, the Middle East, South America, Asia,Countries: South ... hydraulic system. lTransmission:control the speed of drill. lControl rod:use to raise the drill rig,down the drill rig and the ... the screw,it must screw off use the shackle cylinder lDrive shaft:drive the turntable to turn Mud Pump Mud Pump Model ...