... chassis adopts the 6X4 special crane chassis of brand SINOTRUK , the main transmit, transmission power, gearbox, ... equipped with a good drilling bit.The power of drilling rig comes from the truck engine, ... using the adding pressure implement.The master driving of rig is mechanical, the four jacks and mast ... it has a high efficiency because of having a larger torque of the turntable, it is mainly used ...