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What is the variation between N95 and KN95? Professionals educate you to identify all varieties of masks
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Recently, all types of statements about masks in the circle of close friends and the Web have emerged: N95 masks have the ideal influence, sporting far more layers is far more powerful, and changing 1 each few several hours ... In the face of overwhelming messy details, how must we do Self-defense? A few days back, we interviewed Dong Peng, director of the Next Cardiology Section of the General Aviation Hospital, and requested him to tell us how to distinguish in between various masks.
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