Ключевые слова: abstract, aluminum, backdrop, background, black, cage, cell, chrome, closeup, dark, design, fence, grate, grating, gray, grey, grid, grill, grille, grunge, hole, industrial, industry, iron, mesh, metal, metallic, modern, net, old, pattern, perforated, plate, prison, security, shape, sheet, shiny, silver, speaker, steel, structure, surface, technology, texture, textured, wall, wallpaper, white,