Ключевые слова: abstract, against, background, bar, barrier, blue, border, boundary, chain, concrete, construction, design, detail, enclosure, fence, frame, galvanized, gray, grid, industrial, industry, iron, link, material, mesh, metal, metallic, net, netting, pattern, protection, roll, rust, safety, seamless, security, shape, square, steel, structure, texture, textured, twisted, wall, white, wire,