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