The storage principle and operation process of fluent shelves Fluent shelves are based on "gravity potential energy" to achieve automatic circulation of goods, and the operation process follows the one-way logic of "high-end replenishment, low-end pickup", naturally adapting to the "first in, first out" principle. When restocking, the staff places the goods (mostly in boxes or cartons) one by one on the fluent strip at the high end (inclined upper end) of the shelf, and the goods automatically slide towards the low end (inclined lower end) along the roller by gravity until they are blocked by the goods in front or reach the pickup end; When picking up the goods, the staff will directly use the front cargo at the lower end, and the rear cargo will be automatically replenished without additional adjustment. Throughout the entire process, the goods always slide along a fixed path without the need for large equipment such as forklifts or stackers, making it suitable for manual picking scenarios. For example, in an e-commerce warehouse, staff can quickly pick order items at the low-end and replenish them synchronously at the high-end, achieving "parallel picking and replenishment" and significantly reducing order processing time.