... level motion device support rolls device , tuning device , balance device, lubricate device , left and right work frame ... device Composed of ram, bearing, tuning cylinder6) balance device Composed of balance compact, screw7) lubricate device composed of lubricate ... pressure is 20 Mpa , testing pressure is 24 Mpa , pressure adjusted by overflow valve, system working pressure 0-19 MPa , normal pressure ...