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Tag Archives: electric toothbrush rechargeable

  • What’s inside the electric toothbrush

    An electric toothbrush is a tool for cleaning teeth. It consists of a dry battery, a miniature dc motor, a battery case, a toothbrush head, a metal guard plate and a sleeve. The dry battery, as the power source of the dc motor, is installed together with the dc motor in the battery box, which …

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