... rapid Highspeed fence board is made up of uncoiler ,leveling machine ,punching machine ,forming machine ,shearing machine,hydraulic pressure station ,the PLC ... materials for GCR15, quenching HRC58 ° to 62 °, the surface hard chromium plating, the suppression of thickness of 2.5 ... Cr12 quenching process, steel around to arbitrarily regulate)(4)Cut off the hydraulic shear (material Cr12 quenching HRC60 ...