... CONTROL: The production of hole-punching, cutting-off and roll-forming is operated automatically, after the data, such as ... holes, required purlin quantity, etc., is set on touchable screen.3. COMPOSITION: It is composed of decoiler, material guider, ... leveler, 2-station hydraulic puncher, hydraulic cutter, quick-changed-roller roll-former, electronic control system, hydraulic system, etc.4. DRIVEN ...