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Mar 16, 2020 · wearing time range KN90 face mask China List of Face Mask Manufacturers in China: Our Top 7 Picks. The filtration rate of KN90 shall be of at least 90%.

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Compared with the protection level of these two kinds of masks, the N95 mask is better than the KN90 mask. Both of them can effectively protect non-oil dust particles, and both of them can be used as anti haze masks.

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