Ключевые слова: alert, amplifier, announcement, attention, audio, background, black, broadcast, communication, communism, electric, flag, flagstaff, grunge, history, information, loudspeaker, megaphone, message, outdoor, pole, power, public, radio, red, revolution, russia, russian, sign, sky, sound, soviet, speak, speaker, star, symbol, system, technology, tell, textile, texture, union, ussr, vintage, voice, war, warning, wind, wooden,