Ключевые слова: air, background, biological, black, breath, breathe, breathing, clothing, danger, dangerous, defocus background, disaster, emergency, equipment, face, fighter, filter, fire fighters, fire fighting, firefighter, fireman, firemen, full face mask, gas, hazard, heat, hose, industry, mask, nobody, oxygen, pollution, pressure, professional, protect, protection, protective, rescue, respirator, safe, safety, smoke, suit, tools, toxic, uniform, valve,