Ключевые слова: alert, amplifier, announce, announcement, black, blue, broadcasting, cable, cables, celebration, communication, dm, electrical, electricity, energy, equipment, high, industrial, industry, information, line, loud, loudspeaker, masses, mast, megaphone, message, metal, music, norrland, one, outdoor, pole, power, public, radio, shadows, skelleftea, sky, speaker, speaker mast, steel, sunlight, technology, tower, transmission, warning, white, wire, wires,