Detailed Description  Blocking-up Original Position Compression Machine (testing equipment) Rating pressure: 40KN  Limited pressure: 50KN  Max. distance: 20mm  Limited distance: 25mm  Relative indication error: within +/- 3%  Total weight of the equipment: 104KGS, the flat jack 57KGS included.  Plane size of the down pressure plate: 240mm*240mm  Oil reserve: 2Litres  Diameter of the oil tank for the flat jack: 140mm  This equipment is consist of the flat jack, 4 columns, the up pressure plate, the down pressure plate, the ball pad, the hand pump compression rod, the digital gauge and so on.