Ключевые слова: building, business, chemical, coal, construction, design, eco, electricity, element, energy, engineer, engineering, equipment, excavator, factory, flat, fuel, gas, gasoline, graphic, heavy, icon, illustration, industrial, industry, iron, isolated, manufacturing, nuclear, object, oil, petrochemical, petrol, pictogram, pipe, pipeline, plant, pollution, power, production, refinery, set, sign, station, symbol, technology, tower, transportation, web,