Ключевые слова: building, business, coal, construction, design, electricity, energy, engineer, engineering, environment, equipment, factory, flat, fossil, fuel, gas, gear, icon, industrial, industry, isolated, line, linear, lined, logistics, machine, manufacturing, mining, nuclear, object, oil, outline, pipe, pollution, power, production, refinery, robot, set, sign, smoke, storage, symbol, technology, thin, tool, transportation, work, worker,