... 2.Heavy duty,self lock 3.Electric,manual Jacks Lifting Table parts include screw jacks, bevel gearboxes, electric motor, couplings ... , loading, lifting speed, working conditions etc.Jacks Lifting Table Features:1. Heavy duty, self-locking, positioning precision, ... for the production of sheet steel and steel pipes, wood working machines, plastics processing machines, textile machines, assembly equipment ...