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We doubt whether the air cleaner is working. It is a filter that eliminates the doubt.
We will confirm the contamination. We will check the operation of the air purifier. through the small sticker.
Chung - Ang Unigersity
Seoul, South Korea
So Yeon Kim,
Chung - Ang Unigersity
So Yeun kim,
Chung - Ang Unigersity
Min Ji Kin,
Chung - Ang Unigersity
Ju Hee Lee,
Chung - Ang Unigersity
