Ключевые слова: alert, attention, biological, bomb, caution, chemical, collection, danger, dangerous, death, electrical, environment, error, explosion, falling, flammable, graphic, hazard, hot, icon, illustration, isolated, label, laser, logistic, message, notice, precaution, radiation, radioactive, risk, safety, security, set, shock, sign, siren, solid, stop, stumble, surface, symbol, toxic, triangle, virus, voltage, warn, warning, white,