Ключевые слова: abstract, air, background, blue, box, bright, business, cable, closeup, concept, construction, current, danger, design, electric, electricity, energy, engineering, equipment, green, high, industrial, industry, isolated, line, metal, modern, object, orange, plant, power, red, road, safety, shiny, sign, sky, steel, structure, supply, symbol, technology, tower, tube, voltage, warning, white, yellow,