Ключевые слова: appliances, background, black, button, closeup, control, dark, design, detail, device, electric, electrical, electricity, element, energy, equipment, flip, frequency, group, home, industrial, instrument, isolated, light, line, metal, metallic, military, off, old, panel, power, radio, retro, secret, signal, steel, stop, supply, switch, switches, symbol, technology, toggle, up, vintage, voltage, wall, wave, white,