Fluent frame storage efficiency high, suitable for a large number of goods short-term deposit. Widely used in logistics distribution center, cargo operation, press and high degree of automation factory. The goods will be placed on the roller, the use of side channel inventory, the other side channel take delivery of. Rack toward the direction downward sloping shipment, the goods in gravity downward slide. Can achieve fifo, and can realize a replenishment, multiple sorts the goods.