... product -Short delivery -Good after-sale service The shifting winches, cutter ladder and lifting winch are driven by the hydraulic motor ... pump is driven by the auxiliary diesel engine.Functions of cutter suction dredger: dredging river, dredging sand, desilting, reclamation for channels ... : 0086-13562669717Please feel free to ask me for more information. Cutter suction sea sand dredge