Ключевые слова: background, barb, barbed, barbwire, barrier, border, boundary, closeup, copy, crime, danger, dark, defend, defense, design, detail, fence, forbidden, grey, guard, industrial, invade, iron, jail, knot, material, metal, military, node, object, obstacle, prison, private, prohibit, property, protection, razor, rust, safety, security, sharp, space, spikes, steel, text, thorn, trespassing, warning, wire, wiring,