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Mar 07, 2020 However, according to some mask suppliers words, Even if the raw materials increase, the ex factory price of the mask cannot rise! Because the masks produced have either been donated or supplied to the government for distribution, prices cannot be increased. Today Until March 7, 2020, the daily output of full face masks has reached 100

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b. Gb2626 2006 according to the leakage rate of mask and the filtering efficiency of mask itself, masks are divided into three grades90 (Kn90, kp90), 95 (kn95, kp95), 100 (kn100, kp100). This standard is closer to international standards, such as EU standard en149, NIOSH certification of the United States, as 1716 of Australia, js t 8151 of

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Apr 03, 2020 Visually inspect, or ensure that workers visually inspect, the FFRs to determine if the structural and functional integrity of the respirator has been compromised. Over time, components such as the straps, nose bridge, and nose foam material may degrade, which can affect the quality of

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