Ключевые слова: access, admission, beware, cancel, circle, circular, danger, dangerous, denied, entree, entry, exclamation, forbidden, hazard, hazardous, icon, instructional, lift machinery, mark, pedestrian, permission, precaution, prevention, red, resident, round, safe, safety, sign, signboard, slash, symbol, text, triangle, unsanctioned, walking, warn, yellow,