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PH tootbrush / PH tootbrush

PH tootbrush
PH tootbrush

Medical science proves that each time of brush teeth should be more than 2 mins.But how many people can guarantee he spend more than 2 mins brushing teeth?Before you wanna brush teeth, you may splash the water into indicator and the indicator will change the color slowly.The indicator changed from transparent to green to red which means that your 2-minute brushing time has come.


South China Agriculture University

South China Agriculture University
GuangZhou, China