Ключевые слова: access, accident, ad, alarm, alert, attention, barrier, biohazard, black, caution, close, communication, construction, danger, dangerous, design, emblem, guard, hazard, illustration, industrial, information, label, lace, mark, message, notice, object, protection, restricted, ribbon, risk, safe, safety, scene, seal, secure, security, signal, stamp, symbol, warning, white,