... 3)heavy sliding plate 4)air lock 5.5T four-post lift with CE: modellifting capacitylifting heightwideth between postswideth between runwaysouter dimensions ... )slideway for other equipment inside of the runway.7)integrative hydraulic system make the working environment quiet8)compact column design,short ... .10)air lock release,automatic safety locks. 5.5T four-post lift with CE,automatic alignment lift