... hotels hotels,office buildings,department stores bands,posts and telecomunications,power industries,public entertainment places or dwelling ... :Type 40≥40min,Type 60≥60min poison gas and smoke protectig,fireproof,hot-radiation protecting,good sealing property, ... protection:Cabon monxide(CO),hydrogen cyanide(HCN),Poison smoke and fog.c.Mist permeability coefficient5%,d.Inhalation resistance800pa, ...