SJS produced by the introduction of U.S. technology HP-8000-59-H and HP-11000-59-H industrial hydraulic planetary winch, mainly used in track-type tractor-assisted winches, road-block removed vehicles, workover rig and drilling rig-assisted winches, and shiploader as the construction site crane winch pull, heavy use of traction. Characterized by compact structure, small size, light weight, big rally, high efficiency, simple installation, flexible operation, convenient maintenance.