How to wear the surgical mask, Ffp1, Ffp2, Ffp3 and disposable ...
ThisguidewillbreakdownthekeydistinctionsbetweenFFP1,FFP2,andFFP3masks.We'llexploreFFPrespiratorsprotectionlevel,fit,anddesign.,FFP1口罩最低过滤效果≥80%,FFP2最低过滤效果≥94%,FFP3最低过滤效果≥97%。FFP类的口罩,作用都是将油性颗粒物和非油性颗粒物等...。參考影片的文章的如下: