... install in the form of multi-input high reliability Worm Screw Jack:(speed reducer,reducer ,gearbox,gesr units) 1. Model ... Elevating, Lowering, Pulling, Pressing, Pushing, Rotating 4. Power Source: Manually or Electrically 5. Characteristic: Positioning precision, Safely ... self-locking, Heavy duty, Uniform lifting speed, small sizes, easy installation, low noise, long life ...