我不在談政治。KN95和N95和PFF2或3是一種標準吧？隻是因為語言不同，所以縮寫不一樣？

來源: 咪嗚於 2021-02-15 10:39:26 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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