Ключевые слова: advice, alberta, arrow, attention, black, cable, cables, canada, careful, caution, connection, danger, dangerous, death, electric, electrical, electricity, energy, engineering, equipment, forbidden, generator, hazard, high, icon, industrial, industry, injury, line, metal, plant, power, risk, safety, security, sign, station, substation, supply, symbol, technology, transformer, transmission, voltage, warning, wire,