Ключевые слова: advice, alert, arrow, attention, beware, black, board, careful, caution, current, danger, dangerous, death, electric, electrical, electricity, energy, gray, grunge, hazard, high, icon, industrial, industry, inform, information, lightning, metal, metallic, notice, old, power, protect, protection, risk, safety, security, shock, sign, signal, supply, symbol, technology, thunder, triangle, voltage, wall, warning, yellow,