... , safety gas maskSpecifications:1) Fire resistant and flame retardant and used to protectagainst CO and toxic smoke2) Service life, min > ... 1999)a.Effective hour:Type 60≥60min poison gas and smoke protectig,fireproof,hot-radiation protecting,good sealing property, ... of protection:Cabon monxide(CO),hydrogen cyanide(HCN),Poison smoke and fog.c.Mist permeability coefficient5%,d.Inhalation resistance800pa, ...