Ключевые слова: 3d, background, button, change, conduct, connect, contact, control, controller, decision, design, device, electric, electrical, electricity, electronic, element, energy, equipment, handle, hardware, illustration, industrial, lever, metal, metallic, off, old, on, on off, opposites, position, positive, power, regulator, retro, signal, solution, start, steel, stop, switch, technology, toggle, trigger, turn, up, vintage,