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All kinds of rings, turned and grinded, with and without heat-treatment, used for deep groove ball bearings, thrust ball bearings, bearing units, wheel bearings, water pump bearings, various types of roller bearings, needle bearings and non-standard bearings. All CNC automatic production lines have profilometers, spectrometers, radial analyzers and domestic advanced ferrule detection equipment. They use national standard materials and are of reliable quality. The products are widely used in industrial fields such as motors, textile machines, water pumps, automobiles, motorcycles, etc.