Ключевые слова: activities, background, building, business, chemical, construction, contractor, energy, engineer, engineering, environment, equipment, factory, gas, goggles, hard, hardhat, hat, head, head wear, industrial, industry, inspection, inspector, male, man, manager, metal, occupation, oil, person, petrochemical, pipe, planner, plans, plant, power, protective, refinery, safety, site, steel, technology, wear, work, worker,