Ключевые слова: battery, black, button, color, concept, contour, eco, ecology, economy, electric, electrical, energy, equipment, global, graphic, growth, home, house, icon, illustration, invoice, letter r, lightning, line, linear, lined, logo, meter, money, monitoring, monochrome, outline, panel, plant, plug, power, recovery, recycling, removal, saving, sign, solar, symbol, time, tool, world,