Ключевые слова: accident, alarm, alert, alertness, background, box, break, building, burn, business, call, control, danger, detail, down, emergency, fire, flame, handle, high, hospital, industrial, office, panel, press, protect, protection, pull, push, red, ring, room, safe, safety, safty, school, security, services, sign, single, start, switch, symbol, system, trigger, wall, warning, water,