Ключевые слова: alert, alertlevel, alertsymbol, barrel, caution, checkered, container, contamination, contaminationwarning, control, danger, decay, drum, emergency, energy, environment, exposure, hazard, hazardous, healthrisk, icon, industrial, monitoring, nuclear, nuclearenergy, nuclearwaste, power, prevention, protection, radiation, radioactive, radioactivematerials, radioactivesymbol, radioactivity, red, safety, safetysign, science, security, shield, sign, storage, symbol, toxic, toxicwaste, toxiczone, triangle, warning, waste, yellow,