(ภาษาไทย) หน้ากากอนามัย N95 มีวันหมดอายุจริงหรือไม่

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2 thoughts on “(ภาษาไทย) หน้ากากอนามัย N95 มีวันหมดอายุจริงหรือไม่”

    • Hey there, Fit tests found less than a 1% difference in effectiveness between 10-year-old expired 3M N95 masks and brand new masks. That means, masks last pretty long 🙂

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