Ключевые слова: alert, attention, background, beware, bio, biological, black, caution, chemical, construction, danger, dangerous, design, emergency, environment, error, exclamation, explosive, fire, flame, flammable, gas, hazard, hazardous, icon, illustration, industry, information, isolated, label, material, notice, nuclear, poison, protection, radiation, radioactive, restricted, risk, safety, security, set, sign, stop, symbol, toxic, triangle, warning, yellow,