The spatial structure of milk production in Shanghai has three hierarchies:the circular distribution, the system for milk traffic and the collective-distributive network.
圈层分布、奶流系统、收发网络是上海市奶业空间结构的三个层次。
The spatial structure of milk production in Shanghai has three hierarchies:the circular distribution, the system for milk traffic and the collective-distributive network.
圈层分布、奶流系统、收发网络是上海市奶业空间结构的三个层次。
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