The first one DQD80-1 Electric Hydraulic Jack By changing electricity into liquid and using retractable hydraulic jar, DQD80-1 type Electric Hydraulic Jack has strong lifting ability. The second one QD80-8 Pneumatic Hydraulic Jack By changing liquid into electricity and using retractable hydraulic jar, the new type of jack makes it hydraulically which becomes the good lifting equipment. The third one QD50-5 Pneumatic Hydraulic Jack By changing liquid into electricity and using retractable hydraulic jar, the new type of jack makes it hydraulically which becomes the good lifting equipment.