Ключевые слова: art, barrel, building, cash, color, colorful, construction, contour, dollar, drilling, energy, equipment, factory, fire, flame, fuel, gas, gasoline, icon, illustration, industrial, industry, isolated, jack, line, linear, mining, oil, oilman, outline, paper, petrol, petroleum, pipe, pipeline, platform, pop, popart, pump, rig, sea, set, ship, technology, test, tube, worker,