Ключевые слова: abstract, air, airplane, airport, area, background, barbed, barbed wire, barrier, base, blue, border, business, chain, control tower, danger, dusk, fence, flight, guard, industrial, industry, isolated, japan, metal, nagoya, net, plane, prison, protection, restricted, runway, safety, security, sharp, sky, steel, sunrise, sunset, tourism, transport, transportation, travel, urban, view, wall, white, wire, wire entanglement,