Basic Introduction To Disposable Masks

Lub npog ntsej muag pov tseg yog ua los ntawm ntau tshaj peb txheej ntawm cov ntaub tsis-woven ntawm 28 grams; tus choj ntawm lub qhov ntswg yog ua los ntawm ib puag ncig-phooj ywg tag nrho cov yas strips, tsis muaj cov hlau, thiab muaj ib lub pluaj breathable, uas yog xis thiab tshwj xeeb tshaj yog haum rau cov khoom siv hluav taws xob thiab siv txhua hnub. Cov qhov ncauj qhov ntswg pov tseg (cov qhov ncauj qhov ntswg kho mob) tuaj yeem tiv thaiv kab mob ua pa rau qee qhov, tab sis tsis tuaj yeem tiv thaiv kev nyab xeeb. Ua tib zoo saib thaum yuav khoom, koj yuav tsum xaiv lub npog ntsej muag nrog cov lus "kev kho mob daim npog qhov ncauj" kom meej meej cim rau ntawm lub ntim sab nrauv.