Ключевые слова: background, block, bolt, box, bridge, bronze, cable, communication, concept, conductor, connect, connecting, connection, connectivity, connector, construction, contact, control cabinet, current, electric, electrical, electrician, electricity, electronic, energy, equipment, fastening, hole, industry, installation, insulation, isolation, line, link, network, neutral, power, protection, row, screw, security, server, shelf, strip, technology, tools, voltage, wire, wiring, zero,