计算了全新风系统和部分循环风系统的能耗和经济指标。
Calculates the energy consumption and economic index of the full fresh air system and partial circulation air conditioning system.
管道式自然通风系统的使用由来已久，该系统为全新风系统。
Though with a long history, the natural ventilation systems with ducts are full fresh air systems.
管道式自然通风系统的使用由来已久，该系统为全新风系统。
Though with a long history, the natural ventilation systems with ducts are full fresh air systems.
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