Is your system operating with 100% fresh air, or is the system operating in recirculation?

您的系统运行时是采用100%新风方式，还是回风参与再循环的方式？

youdao

Is your system operating with 100% fresh air, or is the system operating in recirculation?

您的系统运行时是采用100%新风方式，还是回风参与再循环的方式？

youdao