Ключевые слова: african, american, architect, architecture, arm, automation, black, builder, civil, construction, contractor, development, electricity, engine, engineer, foreman, fuel, gas, generator, hand, hardhat, hat, heating, helmet, holding, infrastructure, lpg, machine, male, man, management, men, occupation, oil, operator, pipes, plant, power, professional, project, protection, refinery, site, teamwork, technician, turbine, white, worker, young,