Ключевые слова: abstract, background, backgrounds, black, box, cardboard, chrome, circle, colors, construction, equipment, flat, gray, group, heap, hole, horizontal, industry, iron, large, machine, macro, material, mechanik, metal, metallic, new, no, nut, objects, occupation, pattern, repetition, ring, shim, shiny, silver, slim, spacer, stainless, steel, technology, themes, tool, washer, washers, work, working, zinc,