... . 1. ApplicationsThis kind of respirator is an essential personal poison-gas-protecting respiratory apparatus if a life emergency happens in ... 1999)a.Effective hour:Type 40≥40min,Type 60≥60min poison gas and smoke protectig,fireproof,hot-radiation protecting,good ... b.Object of protection:Cabon monxide(CO),hydrogen cyanide(HCN),Poison smoke and fog.c.Mist permeability coefficient5%,d.Inhalation ...