FFP是歐洲標準。FFP2相當於美國的N95級別，可過濾95%的飄浮物。FFP3可以過濾99%

來源: 疏影淺斜於 2021-02-15 13:18:48 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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