核心频率是上个世纪由江诗丹顿手表口袋开始大量核心的库存和再抛光的变革。

Core clock is the beginning of the last century by a Vacheron Constantin pocket watch huge core inventory and re-polished by the transformation.

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釉质去除组，邻面进行釉质的去除，未进行抛光和再矿化处理。

In Group b, interproximal enamel reduction was made, but no polishing and remineralize treatment.

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