Imaski yonyango
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Imibala emininzi yemibala emi-3 yoPhando lweMask
Isigqumathelo esenziwe ngophawu esilahlwayo kunye nesobuso seMaski ye-ASTM yenqanaba lesi-3 masks sibonelela ngesithintelo esingumaleko-3 somzimba ukukhusela lowo unxibileyo kulwelo, ungcoliseko, umungu, uthuli, kunye namanye amasuntswana omoya avavanywa ngeelebhu ezingama-98 zeBFE. Kwaye iimaski ezinobunzima bokuKhanya zakhiwe ngamalaphu angenalukhuni kunye nolusu oluthambileyo lwendlebe iiyure zokunxiba kakuhle.
