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Ключевые слова:
advice, alert, arrow, attention, board, caution, charge, close, current, danger, dangerous, death, detail, electric, electrical, electricity, electrocution, energy, fence, hazard, high, icon, industrial, industry, line, manufacture, metal, metallic, notice, power, precaution, prevent, protect, protection, risk, safety, security, sign, signal, substation, supply, symbol, tension, transformer, triangle, volt, voltage, warning, yellow,