Ключевые слова: access, area, attention, background, banner, barbed, barbed wire, barbwire, barrier, blue, border, boundary, caution, closed, closeup, concept, danger, entry, fence, forbidden, freedom, guard, iron, keep out, message, metal, military, plate, prevention, prison, privacy, private, prohibition, property, protection, restricted, restricted area, safety, security, sharp, sky, steel, symbol, trespass, trespassing, wall, war, warning, wire, zone,