What's the difference between shuttle warehouse and stacker warehouse?

The periphery of the dense shuttle-type three-dimensional warehouse adopts a stacker or a "sub-mother car+hoist" to enter and leave the warehouse, and the shuttle shelves and shuttle boards are arranged inside. Different from the traditional three-dimensional warehouse, there is no roadway, so the storage density is increased by 30%, but it also leads to a single inventory, low efficiency of entering and leaving the warehouse and difficulty of "first in, first out". In terms of cost, the dense shuttle warehouse omits a large number of lane stackers and uses fewer shuttle boards with slightly lower prices, but it increases the shelf cost. Therefore, the two are different and need to be selected according to actual needs.