... C,E,F,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 of the following equipment: 1. Mill ... -layer, 5-layer, 7-layer, and multifunction corrugated cardboard production line has high, middle and low grade with different ...