Ключевые слова: alarm, antenna, black, bullhorn, cabinet, contour, danger, emergency, equipment, escape, extinguisher, fire, fireman, helmet, hose, hurdle, icon, isolated, line, linear, loud, loudspeaker, occupation, outline, portable, protection, red, reel, repair, rescue, road, safety, security, set, sign, silver, speaker, stop, symbol, system, talkie, traffic, transceiver, transmitter, uniform, walkie, warning, water,