Ключевые слова: alarm, arrow, background, black, board, box, caution, concept, danger, dangerous, death, design, discharge, electric, electricity, energy, flash, graphic, gray, high, horizontal, icon, industrial, industry, label, lighting, lightning, message, metal, object, old, outdoors, power, risk, safety, security, shock, sign, silver, sing, symbol, triangle, voltage, wall, warning, web, white, yellow,