... 5. Hydraulic system6. Back gauge, 7. Upright, 8. Electrical cabinet, 9.Beam, 10. Cylinder, 11.Control panel6. Design & Inspection ... hydraulic synchronization system--Mechanical-hydraulic synchronization system, which use a torsion bar to ensure the parallelism between beams, ... piston is hardened and shows a superfine finishing.The electrical control system is a switch cabinet on the right side frame. ...