Ключевые слова: advice, arrow, attention, background, beware, black, careful, caution, closeup, danger, dangerous, dangersign, death, dirty, discharge, electric, electricity, energy, forbidden, gray, grey, hazard, hazardous, high, high voltage, icon, industry, label, lightning, metal, people, power, protection, risk, safety, security, shock, sign, silver, sing, supply, symbol, triangle, triangular, voltage, wall, warning, yellow,