Ключевые слова: alert, arrow, attention, background, black, blue, board, careful, caution, charge, close up, closeup, conductors, current, danger, dangerous, detail, distribution, electric, electrical, electricity, energy, fence, hazard, hazardous, high, industry, metal, metallic, notice, power, powerline, powerplant, precaution, protection, risk, safety, sign, signal, single, sky, supply, symbol, technology, tension, triangle, voltage, warning, white, yellow,