Ключевые слова: atom, barrel, beaker, black, business, canister, cargo, chemical, chemistry, contour, dollar, drilling, ecology, energy, environment, equipment, exchange, freight, fuel, gas, gasoline, icon, industrial, industry, isolated, leaf, line, linear, molecular, molecule, money, oil, outline, petrol, price, rig, science, sea, set, ship, shipping, symbol, technology, test, transportation, tube, vessel,