Ключевые слова: adult, analyzing, caucasian ethnicity, chemistry, clothing, concentration, construction industry, danger, dark, disguise, engineer, equipment, expertise, factory, holding, hood, indoors, industry, lighting equipment, looking, males, mask, men, night, occupation, one person, outdoors, people, professional occupation, protective eyewear, protective glove, protective mask, protective suit, protective workwear, safety, science, scientific experiment, scientist, security, surgical mask, teamwork, technology, two, unrecognizable person, women, working, workwear, yellow, young adult,