... fence board is made up of uncoiler ,leveling machine ,punching machine ,forming machine ,shearing machine,hydraulic pressure station ,the PLC computer control ... ;(2)The whole flat for three rollers on the four roll, molding shaft diameter Φ 80 mm (material 45 # ... through the quenching and tempering treatment), roll materials for GCR15, quenching HRC58 ° to 62 °, the surface ...