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Thin Red Line / Thin Red Line

Thin Red Line
Thin Red Line

We do not know how much toothpaste squeeze when each time we brush . Now we color to distinguish
between the two red line in the boothbrush (red line within the area that the number of the amount) .


East china jiao tong university

East china jiao tong university
Nanchang city, China


East china jiaotong university

East china jiaotong university
nanchang jiangxi, China

Wenyu Hu Yuecen Han Junbin Liu Shuai Zhang