... Air pressute:1.05-2.46Mpa Dayu Multi-Function Water Well Drilling RigZhengzhou Dayu Machinery Co.,Ltd. have produced rock ... crawler mining drilling rig4,Truck mounted water well drilling rig5,Crawler water well crawler mining drilling rig6,Diesel movable screw ... and agricultural water convervancy projects, such as drilling wells, testing wells or geothermal heating. This drilling rig can work in ...