... slope drilling, civil construction works.ZGYX-6500 Rock Drill drilling aperture of 76-152 mm (2-5 ... 14 / 5 inch and 2 inches.When using the steel drill pipe, diameter up to 6 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 ...