... with touch screen, 3,pre-bending of high precision,rich bending shapes such as O,U 3 roller rolling machine ... structure is composed of upper roller , down rollers and level motion device support rolls device , ... , screw3-3. Hydraulic system Composed of Y series motor, gear pump , valves , oil tank ... 15Mpa . the valves adopted from Taiwan.3-4. Electricity system Composed of electrical box, operation ...