Ключевые слова: background, black, building, business, checking, construction, control, employee, employment, energy, engineer, engineering, engineers, equipment, factory, female, hard hat, hardhat, helmet, industry, inspector, job, maintenance, man, manufacturing, mechanic, people, person, pipe, pipeline, pipelines, production, professional, pump, safety, site, staff, structure, supply, system, technician, technology, tube, turn off, valve, woman, work, worker, workplace, young,