... resistance, lightweight and long life.Gas life:Cyanogens chloride: not less than 50 minutes at 30 L/min.(1),5mg/L, 80 ... -80% RH conditions.Hydrocyanic acid: not less than 50 minutes at 30L/min, 3mg/L conditions.(2),Oil ... at 30L/min.(5),Visual field: Total not less than 75%, binocular visual field not less than 30%.(6),Weight: Complete set of mask ...