1. The dust mask has a certain filtering volume, beyond which dust cannot be prevented. Therefore, for some places with high dust concentration, we should first carry out engineering transformation to control the dust, reduce the dust concentration below the allowable concentration, and then consider wearing dust masks.
2. Improper wearing of dust mask can't prevent dust. This includes not only wearing the mask according to the instruction manual to ensure that the position is correct and appropriate (no air leakage) every time, but also insisting on wearing it when dust is exposed, finding out the signs of mask failure in time and replacing it in time.
3. The mask should be marked with the manufacturer's logo, certification grade, compliance standard and product code. Check clearly when choosing, and choose products with guaranteed quality.