What's the difference between medical face mask and 3 layer mask medical mask bacterial filtration 95
The "heart" has many kinds,and we have a very important technical data to distinguish them:Bacterial Filtration Efficiency(BFE).For medical use,the BFE should be >=95% or >=99%.For general use,we also call civilian use face masks,the melt blown fiber does not have such technical data,but if we have tested the civilian use face masks, the BFE is 3 layer mask medical mask bacterial filtration 95
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