... 3ply, 5ply, 7ply, and multi-function corrugated cardboard production line mainly consist of the following equipments. The 3ply, 5ply, ... 7ply, and multi-function corrugated cardboard production line mainly consist of the following equipments: Mill Roll Stand, ... Pre-conditioner, Pre-heater, Auto-splicer, Single Facer, Conveying Span Bridge, Multi-ply Pre ...