區別明顯。防花粉口罩薄很多，透氣性好，不勒耳朵。花粉顆粒直徑10-200微米，新冠病毒大概是0.06-0.14。

來源: Shubin 於 2023-04-15 11:37:42 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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