Ключевые слова: accident, attention, balance, beware, black, careful, caution, cleaning, danger, direction, falling, floor, front, hazard, humor, injury, insignia, irony, isolated, light, liquid, manual, ngraphic, painting, people, pictogram, precaution, prevention, risk, safety, sign, silhouette, slip, slippery, surface, symbol, triangle, victim, view, warning, wet, worker, yellow,