Ключевые слова: 20th century, antique, background, box, cable, circuit, clips, communications, connectivity, connectors, control, covered, damaged, dirty, distribution, electric, electrical, electronic, energy, equipment, factory, historic, history, hub, industrial, industrialization, industry, interconnecting, iron, lines, metal, object, panel, plug, plugs, power, repair, retro, safety, supply, switch, switching, system, technology, telegraph, telegraphy, telephones, tool, vintage, wires,