Ключевые слова: abstract, background, barbed, barrier, border, boundary, breach, break, cage, chain, closeup, construction, crime, danger, decoration, design, escape, fence, forbidden, frame, freedom, grate, gray, grid, industrial, iron, link, mesh, metal, metallic, modern, net, netting, old, ornament, pattern, prison, protection, retro, rust, rusty, security, shadow, shape, silhouette, steel, texture, textured, wallpaper, wire,