... preparatory phase of the slope drilling, civil construction works.ZGYX-6500 Rock Drill drilling aperture of 76-152 mm (2-5 ... inches, stage height up to 25 meters. Rock Drill ZGYX-6500 diesel engine-driven, crawler frame stable, rough roads, drill all ... the working procedures of car driving chamber.ZGYX-6500 Main Technical SpecificationsWorking Wind Pressure (Mpa)0.8 - 1.2Air ...