... ironworker adopts mechanical driving, and the frame adopts steel welded structure, which has sufficient strength and rigidity. ... and notching the square,round and angle bar, channel and joist, etc TECHNICAL PARAMETER:Punching pressure: 55ton ... punching,shearing angle steel,shearing rounds,shearing square steel,shearing steel plate,mould shearing,shearing-beam,shearing channel steel and punching shutter ...