quotation anti pm2.5 4 layer medical face mask standards

  • quotation anti pm2.5 4 layer medical face mask standards

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Its useless. The design standard of anti haze mask is different from that of medical mask and cannot be used intercept the virus. If the inner filter material contacts virus, it is easy to be polluted again. In addition, anti haze masks are often with decorative, warm design. It is not recommended to use anti haze masks in epidemic situations.

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