Ключевые слова: air, background, biohazard, breathing, chemical, chemistry, concept, construction, contractor, coveralls, danger, disaster, dust, engineer, environment, environmental, equipment, face, filter, food, foreman, gas, hardhat, hat, hazardous, industrial, industry, isolated, man, mask, mechanic, medicine, occupation, painter, person, pollution, portrait, protection, protective, radiation, respirator, safe, safety, suit, toxic, waste, wearing, white, work, worker,