Ключевые слова: art, building, business, businessman, canister, color, colorful, construction, contour, diesel, dollar, drilling, drop, energy, environment, factory, finance, fire, flame, fuel, gallon, gas, gasoline, green, icon, industrial, industry, isolated, jack, line, linear, mining, money, nozzle, oil, outline, petrol, petroleum, pop, popart, power, price, protest, pump, rig, set, station, stock, trader,