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06-04
2020No need to wear masks at work and school! But to meet these conditions
Recently, the national health and Health Commission issued a detailed classifica......
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06-04
2020Nano fiber mask will be mass produced: it can be recycled for 10 days, with the protection rate of 99.99%
The nano fiber mask will be mass produced: it can be recycled for 10 days, and t......
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06-04
2020How to solve the problem of "difficult mask" under the epidemic situation?
The novel coronavirus pneumonia is coming soon, and masks have become the most p......