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Day-counting Toothpaste / hygiene

Day-counting Toothpaste
Day-counting Toothpaste

People always emphasize oral hygiene, but they don't known a fact cleaning tools are consumed. Once a toothbrush is used for 3 months long, it becomes less effective unavailable to keep oral Once a toothbrush is used for 3 months long, it becomes less effective unavailable to keep oral hygiene.

University

Far East University

Far East University
Tainan, Taiwan

Chen Guan-Wei,
Far East University

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