Ключевые слова: background, bevel gearing, black, close up, cog, cogwheel, component, detail, engineering, engrenages, equipment, galvanized, galvanized steel, gear, gearing, gears, helical, helix, industrial, industry, machine, machine component, machinery, macro, mechanic, mechanical, mechanics, metal, objects, particular, pattern, screw, screws, spring steel, springs, steel, texture, textured, thread, threaded, threaded screw, torsion, torsion spring, torsonial, wheel,