... in the form of multi-input high reliability Worm Screw Jack:(speed reducer,reducer ,gearbox,gesr units) 1. ... . Configuration: Worm and worm gear, bearing, housing and lead screw 3. Function: Elevating, Lowering, Pulling, Pressing, Pushing, Rotating ... Manually or Electrically 5. Characteristic: Positioning precision, Safely self-locking, Heavy duty, Uniform lifting speed, small sizes, easy installation ...