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toothbrush with bristle height gradually decreasing towards the longitudinal axis of the head of the toothbrush.
toothbrush with bristle height gradually decreasing towards the longitudinal axis of the head of the toothbrush.
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机译:刷毛高度朝着牙刷头部的纵轴逐渐减小的牙刷。
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摘要
toothbrush in which the height of the bristles, present on its head, decreases progressively from its lateral edges toward the longitudinal axis of this.for the tips of bristles identify a hollow elongated free which is parallel to the longitudinal axis of the head.
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