Ключевые слова: business, construction, control, drill, ecological, energy, engineer, engineering, environment, equipment, exploration, factory, fuel, gas, gasoline, hardhat, helmet, industrial, industry, inspection, inspector, manager, manual, men, oil, outdoor, people, person, pipe, pipeline, pipes, pollution, power, pump, refinery, safety, site, steel, surveyor, technology, transportation, trash, tube, work, worker, working,