Ключевые слова: barrel, barrels, blue, business, chemical, chemistry, construction, container, danger, drum, energy, environment, environmental, equipment, factory, fuel, gallon, garbage, gas, gasoline, hazard, hazardous, horizontal, industrial, industry, inspection, line, liquid, metal, natural, oil, old, petrol, petroleum, plant, pollution, power, record, safety, sky, spherical, stacked, steel, storage, tank, tanks, technology, toxic, urban, waste,