A model of the implantable bioartificial kidney shows the two-stage system.

置入式生物人工肾模型二级系统示意图。

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Compared with the one-stage system, the two-stage system has the better performance in whole. Energy savings and the capability to use low temperature heat are obtained.

较单级系统而言，双级空调系统具有良好的整体性能与节能效益，在使用低温热源上有较大优势。

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Compared with the one-stage system, the two-stage system has the better performance in whole. Energy savings and the capability to use low temperature heat are obtained.

较单级系统而言，双级空调系统具有良好的整体性能与节能效益，在使用低温热源上有较大优势。

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