How to Distinguish the Front and Back of Disposabl
Why should we correctly distinguish the front and back of a mask?
Many people may think it's all the same, as long as you're wearing it. This is not the case. The front and back functions of masks are different. Many masks use a three-layer design.
https://www.skmedicalprotective.com/news-distinguish-the-fro...
Many people may think it's all the same, as long as you're wearing it. This is not the case. The front and back functions of masks are different. Many masks use a three-layer design.
https://www.skmedicalprotective.com/news-distinguish-the-fro...
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