differenc Two-sidetoothbrushes from traditional toothbrushes *Capable of cleaning the inner side of teeth more effectively and eliminating residua left in the gaps thoroughly *Capable of removing speckles completely and preventing efficiently from decayed teeth and Differences from traditional toothbrushes tooth stone *Shortening the time required for brushing teeth *Freeing people from trivial details and inconvenience in using the traditional toothbrushes *Saving the trouble of teaching children how to brush their teeth in a correct way
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