Ключевые слова: abstract, black, border, boundary, cage, chain, closeup, concepts, connection, construction, danger, design, elements, fence, frame, freedom, grid, grunge, guard, illustration, industrial, industry, iron, isolated, link, mesh, metallic, pattern, plastic, protection, safety, seamless, security, shape, sport, steel, technology, tehnology, texture, textured, wall, white, wire,