牙醫診所都賣。還可以用HSA裏的錢。我喜歡用強弱檔的弱檔，力不要太強，磨得時間長一些。

來源: 7Sle 於 2016-10-18 14:11:21 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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