Shielded rotary toothbrush
作者： Dwight S Beckner
DOI:
关键词: Toothbrush 、 Cleaning teeth 、 Shielded cable 、 Engineering 、 Brush 、 Electrical engineering 、 Object (computer science) 、 Mechanical engineering
摘要: This invention relates to means for brushinj and cleaning teeth in one's mouth by o. a power driven brush. A primary object of th
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