对于合理应用机械-自然交替通风系统，节能降耗具有实际意义。
It is of practical significance to the rational application of the mechanical-natural ventilation system and the energy saving and consumption reduction.
采用混合式通风方式，自然通风和机械通风可以依据不同的条件交替运行。
Compound ventilation mode is adopted in this system, so that natural draught and mechanical ventilation can alternately function under different conditions.
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