... Uniform Lifting Speed, Low Efficiency, Use Infrequently, Easy Installation, Low Noise.* Linear Motions: Elevating,Lowering,Pulling,Pressing, ... and Electrical Operation are available.* Multiple Screw Jack Systems are availbale and fully synchronized.* Absolutely irreversible, they ... their applied loads without needing any brakes or other locking systems.* Three reduction ratio are available for each ...