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