... ,G, etc. Corrugated Cardboard Production Line is the professional equipment for producing corrugated cardboard.Single Faced, 3-layer, 5-layer, 7-layer, and multifunction corrugated cardboard production line mainly consist ... , etc.The 3-layer, 5-layer, 7-layer, and multifunction corrugated cardboard production line has high, middle and low grade with different specification and ...