The main segment section of the main line is a straight section that consists of plate link chain segment, roller segment, differential speed segment, powerless roller segment and various dedicated mechanisms. Part of the section requires speed controlled by frequency variation. The packing section is a straight section with powered roller segment. The vacuuming section is a linear moving section with fast return, speed controlled by frequency variation, and the carts established. The jacking and translating structural form is applied to vacuuming at entrance and exit. The main vacuuming segment moves synchronously with the differential speed bedplate segment in the middle section. The internal line is a fast return line of bedplates.
