Speaking of N95 masks for preventing smog and dust, let us first understand smog and PM2.5. Does smog=PM2.5? The main components of haze are sulfur dioxide, nitrogen oxides and inh
2021-08-20
According to general practitioners in the United States, it has been medically confirmed that small particles smaller than 2.5 microns (called PM2.5) can cause severe inflammation,
2021-08-20 Correct use of disposable sanitary masks:How to wear a mask1. The mask has two sides, white and blue, with the white side facing inward, and the white side is aseptically processed
2021-08-20 Masks generally refer to appliances worn on the mouth and nose to filter the air in the entrance and exit nose to prevent harmful gases, odors, and droplets from entering and exiti
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