Ключевые слова: abstract, background, barrier, border, boundary, bright, brown, cage, chain, closeup, concept, construction, design, detail, element, fence, focus, grid, industrial, industry, iron, light, link, macro, material, mesh, metal, metallic, net, netting, old, orange, pattern, prison, protection, red, retro, rusty, security, sign, soft, square, steel, surface, texture, textured, up, wall, white, wire,