... a new Europe-type RNF-Series Cubic Gearboxes Jack Screws Lift, small&compact appearance, installation sizes is the same ... pairs or multiple jacks systems and can be driven by electric or manually, fully synchronization.Speed of Travel* Fast ... ,electric motor,travel nut,protetive tube,rubber bellows,limited switches,couplings,linking shaft,trunnion base etc.Application Industries:Precision lift table, ...