-Corrugated cardboard production line , -3 layer, 5 layer, 7 layer -Speed 60-200m/min ... to 2500mm High speed corrugated paperboard production line 3/5/7layer. Complete corrugated paperboard production line is compose of shaftless mill roll ... stand, fingerless type single facer( vacuum suction type), preheater, double bridge ,gluer machine, double facer ...