PPE

not all high-tech masks can prevent haze

not all milk is called terenzo, and not all masks can prevent haze

recently, Lao Yang was surprised by all kinds of masks. You say you don’t know what masks are useful. You will know after reading this article. But you choose a hairy Hello Kitty with rough workmanship and fake color matching. Lao Yang can’t help you with this aesthetic problem

to get down to business, let’s talk about which masks can’t prevent haze:

1. Disposable masks bought by hospitals and pharmacies. Whether it’s white, green, blue, pink, even rainbow can’t

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