Ключевые слова: abstract, background, barb, barbed, barrier, base, black, border, boundary, building, cage, chain, close up, closed, closeup, construction, crime, danger, dangerous, fence, forbidden, freedom, grey, grid, guard, industrial, industry, iron, jail, mesh, metal, metallic, nature, net, pattern, prison, protect, protection, safety, security, selective focus, silhouette, steel, sunset, texture, wall, wallpaper, wire, wire mesh fence, zone,