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Telescopic toothbrush / Telescopic toothbrush

Telescopic toothbrush
Telescopic toothbrush

The toothbrush’s back has a movement key.Because the brush head is made of soft rubber, so move the key can adjust the length of the brush head.
Toothbrush hair will because the length of the brush head and become dense and sparse.

University

Chengdu University of 

Chengdu University of 
Chengtu, China

芸 肖,
Chengdu University of