同时使得库存结构得到优化，存储空间得到合理配置，减少了重复劳动，降低了运输及仓储成本。
Meantime, it improves the stock structure and makes the storage space reasonable. Besides, it decreases the rehandling and reduces the cost of transportation and storage.
第三部分介绍了基于成本优化的多级控制结构和单级库存、多级系列库存。
The third part mainly introduces the configuration of the multi-echelon inventory systems based on cost.
第三部分介绍了基于成本优化的多级控制结构和单级库存、多级系列库存。
The third part mainly introduces the configuration of the multi-echelon inventory systems based on cost.
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