Ключевые слова: alternative, art, background, building, cable, clean, connect, connection, contour, eco, ecology, electric, electrical, electricity, energy, environment, flat, generation, generator, hydro, icon, illustration, industrial, industry, isolated, light, line, linear, lineart, nature, outlet, outline, plastic, plug, power, renewable, river, rosette, socket, supply, switch, technology, turbine, voltage, water, windmill, wire,