Ключевые слова: abstract, background, chrome, city, closeup, construction, cover, curb, depth, drain, field, floor, frame, garbage, girder, grate, gray, grid, grill, grille, gutter, hole, industrial, industry, iron, jail, joist, lid, manhole, mesh, metal, old, pattern, pavement, plate, rough, rust, sewer, steel, street, striped, technological, technology, texture, tough, tree, urban, warehouse, water, white,