Ключевые слова: abstract, app, application, art, barrel, black, business, button, car, chemistry, concept, design, element, energy, equipment, filled, flat, fuel, gas, gasoline, graphic, icon, illustration, industrial, industry, isolated, lubricant, modern, oil, petrolpetroleum, power, pump, refine, refuel, rig, safety, set, shape, sign, silhouette, simple, station, symbol, tanker, technology, universal, valve, web,