Is your HVAC system running continuously, or do you have a night mode, or just switch the system off after the working time?
您的空调净化系统是持续运行，还是有“夜间模式”的？或者是在完成工作后关掉系统？
Is your HVAC system running continuously, or do you have a night mode, or just switch the system off after the working time?
您的空调净化系统是持续运行，还是有“夜间模式”的？或者是在完成工作后关掉系统？
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