Ключевые слова: abstract, background, barrier, blurred, border, boundary, braided, cage, cell, chain, closeup, connection, design, detain, enclosure, fence, grid, guest, industrial, industry, installed, iron, jail, link, material, mesh, metal, net, pattern, penetration, prevent, prison, private, property, protection, protective, safety, security, stadium, steel, strength, system, texture, unwanted, wire,