Ключевые слова: arrow, attention, beware, black, careful, caution, danger, dangerous, dangerously, down, electric, electric utility, electricity, energy, fence, flash, force, hazard, high, high voltage, hint, industrial, information board, lightning, notice, plate, power, power plant, power supply, protection, risk, safety, security, shock, sign, signal, signs, stream, stress, substation, supply, symbol, thunder, transformation, transformer, triangle, voltage, warning, warning sign, yellow,