... engineering and water-well drilling rig adopts large gantry frame who up and down is ... 400 engineering and water-well drilling rig adopts large gantry frame who up and down is controlled ... by mechanical system, double hoist set, large module, hyperboloid turntable, large torque and easy to operate. This type ... highway and road, ports, dams and large-diameter borehole piles and deep well drilling.