Ключевые слова: abstract, background, barbed, barrier, black, border, boundary, cage, chain, chained, chainlink, closeup, construction, design, element, enclose, enclosure, fence, graphic, grid, illustration, industrial, industry, iron, isolated, jail, link, linkage, mesh, metal, metallic, net, old, outdoor, pattern, prison, protection, safety, security, shape, steel, strong, system, texture, wall, white, wire, wired,