What are the characteristics of masks

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General masks are made of gauze or aerated light foam materials, which can filter wettable powder particles and reduce inhalation and exposure of facial skin to protect the face from contamination.But it can't stop the gas from passing through. It can't be used to prevent poisonous gases.

 


In some cases, a second spray on the same day requires a new mask, which does not have an interchangeable filter and is difficult to clean, can only be used once and must be destroyed after use.

https://www.unisourcesgroup.com/news/16.html

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