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There are always some small accidents in our daily life, like the toothpaste fall off from the toothbrush, before brush ones teeth.
We change toothpaste a little to solve this problem, make the opening more narrow, use the banding instead of the column, augment the contect surface between toothpaste and toothbrush
JiangNan University
Wuxi, Jiangsu Province, China
Jie Shen
JiangNan University
Wuxi, Jiangsu Province, China
Tian Tang