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手动或操纵杆控制开启开启关闭及调节通风量，操作简便；
Manual or control level controlled switching and ventilation adjustment, enabling easy operation.
youdao
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手动或操纵杆控制开启开启关闭及调节通风量，操作简便；
Manual or control level controlled switching and ventilation adjustment, enabling easy operation.
youdao