Ключевые слова: arrow, auto, background, black, business, button, color, concept, conservation, control, design, electric, electrical, electricity, energy, environment, equipment, facility, finger, hand, home, icon, idea, industry, isolated, light, machine, manual, off, on, plastic, power, press, push, save, shutdown, space, start, supply, switch, symbol, technology, toggle, touch, turn, utility, wall, white,