... 750 tons 3.By human or electric drive hydraulic pump Hydraulic Bottle Jack 1.Simple structure,light weight,easy to ... version. 3. By human or electric drive hydraulic pump , through hydraulic transmission system .Hydraulic jack divided into unitary type and disconnection-type.The ... Hydraulic Jack's structure is compact, can smooth roof up heavy loads ,the Max. weight of up is 750 t,transmission ...