hot sale RHF-200 water well drilling rig 1 gained 3 national practical new-type patents invention 2 drilling depth: 30-200m water well drilling rig Specially recommended1.53X59 driving lever is adopted ,high rigitidy,strong delivery torque2.This machine adopts national patent technology taper clutch,with charactristics of strong transmission torque,easy opeation,free maintenance3.Hoist planetary ...