A . 0.2%NaF,8%~10%SnF2或APFB . 2%NaF,8%~10%SnF2或APFC . 2%NaF,2%~5%SnF2或APFD . 2%NaF,2%~8%SnF2及APFE . 2%NaF,10%~15%SnF2及APF
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