... ON-LINE HOLE-PUNCHING roll forming machine 1,SUIT UPRIGHTS, BEAMS 2,Hydraulic Punch 3,Roller Feeder roll forming machine LMS ON ... -LINE HOLE-PUNCHING ROLL FORMING PRODUCTION LINE1. SUITABLE ... hydraulic hole punching, reinforcing bid pressing---material feeding--- roll forming--- straightening--- hydraulic cutting off---- material unloading, ...