我戴的是油漆工的N95，厚度大約是KN95的兩三倍，大致上累計8到16小時換掉。裏麵再套一個普通口罩，隻用一天。

來源: 周老大於 2022-01-04 07:58:17 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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