Ключевые слова: adult, awe, building, business, caucasian, chemical, concept, construction, contractor, control, energy, engineer, equipment, factory, foreman, front, fuel, gas, hardhat, helmet, importance, industrial, job, large, machine, male, man, manufacturing, occupation, oil, person, petrochemical, plant, portrait, power, precautions, production, professional, refinery, respect, safety, site, technician, technology, turbine, well, worker, working, yellow,