After the concepts introduction of product life cycle and circular economy, a resource circulation model is presented in this paper.
介绍了产品全生命周期和循环经济的概念，提出了产品的资源循环模型。
After the concepts introduction of product life cycle and circular economy, a resource circulation model is presented in this paper.
介绍了产品全生命周期和循环经济的概念，提出了产品的资源循环模型。
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