The ultraviolet light onlv irradiates along the straight line, which can not effectively eliminate the bacteria and mites behind the obstacles. There is a certain dead angle, and there is a slight smell after workingIt needs to be ventilated for about 10 minutes.
Ozone is a gas, which can effectively cross over obstacles, better make up for the place where ultraviolet radiation is not enough, with less dead angle, strong smell after wor and ventilation for at least half an hour.
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