Ключевые слова: abstract, backdrop, background, bar, black, blank, board, building, cell, construction, dark, dirty, durable, engineering, falcate, fittings, gray, grid, grunge, hotrolled, icon, illustration, industrial, industry, iron, material, metal, metallic, pattern, periodic, primary, prison, profile, reinforced, rod, rough, round, shape, sheet, square, stainless, steel, strength, technology, texture, vintage, wall, white,