... punching and collect the punched cards.High sensitivity optical fiber sensor cooperating imported no-crevice built-in roller screw mandrel to ... , the cards are collected independently not to affect the punching speed, the machine can punch the cards quickly and reliably.(especially ... plastic materials......Punching Sheet3*7, 3*8, 3*9, 4*8, 4*9, 5*5 or other formatVoltage Input380V 50/60HzPower3.5KWAir ...