... pressure, improve its lifeWalking pressure11Mpa14-16 MpaDrill boom partsNew type drill boom Drill level ,vertical hole at the ... same time . And lower level holeHydraulic system30pump,large valve,new flow divider and connect19.2 pumpIncrease the flow, ... decrease the resistance , more tidy shapeCarrier gas systemLive type impacting valveBall valveBetter operationRotation speed83r/min(diesel 1700r/min) ...