Ключевые слова: alternative, atom, banner, building, business, chemical, cog wheel, collection, connected, construction, derrick, dots, droplet, ecology, economic, electricity, energy, engineering, equipment, factory, fuel, gas, gear, germany, icon, illustration, industrial, industry, innovation, internet, label, lines, machine, manufacture, manufacturing, nuclear, oil, petrol, plant, pollution, power, recycling, refinery, set, silhouette, supply, symbol, technology, web, wind,