Ключевые слова: abstract, abstraction, aluminum, backdrop, background, barrier, black, cage, cell, cellular, chiang mai, circles, circular, concepts, connection, empty, enclosing, enclosure, fence, grate, grey, grid, grill, grille, industrial, iron, isolated, lattice, link, material, mesh, metal, metallic, modern, net, neztting, nobody, pattern, permanent, protection, radiator, railing, regular, screen, separate, shape, steel, structure, surface, texture, thailand, tied, wallpaper, window,