Ключевые слова: blue, bus, cable, cabling, capital, city, communication, conductor, connect, connection, contact, danger, ecology, electric, electrical, electricity, energy, engineering, equipment, high, industrial, industry, line, metal, network, overhead, parallel, power, sky, steel, supply, suspension, system, technology, traffic, transport, transportation, trolley, trolleybus, urban, vehicle, voltage, wire, wiring,