... 电刷量规 brush ga(u)ge 刷柄 brush holder 换向器电动机；整流式电动机；换向器马达；整流式马达 brush motor ...
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那就是说，牙刷柄应该合手，牙刷头应该合嘴并能刷到牙齿的每个面。
That means the toothbrush handle should fit comfortably in your hand and the toothbrush head should feel comfortable in your mouth and be able to reach every tooth surface.
画一个刷柄的形状，并用黑色填满。
还示出将该刷单元设计用于手动牙刷刷柄。
The brush unit design is also shown applied to a manual toothbrush handle.
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