A special electric toothbrush design, with appearance patent.
本作品版权归 朱荣华原创设计 所有，禁止匿名转载及个人使用，任何商业用途均需联系原作者。
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Toothbrushes should not be made of such complicated step features. People who have used them all know that they can hide things.
Too many keys feel so complicated
very nice!