Ключевые слова: activity, adjusting, attention, banner, bio, biohazard, black, button, caution, chemical, cold, danger, electric, electrical, electricity, explosion, extreme, fire, flame, flammable, gas, hazard, icon, illustration, industrial, industry, injury, isolated, laser, mask, nuclear, poison, pollution, protection, protective, radiation, radioactive, risk, safety, shape, shock, sign, signal, skull, symbol, toxic, triangle, warning, yellow,