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Company Introduction Hunan circular power parts co., Ltd. was founded in 1943, the first piston ring maker in China Changsha circular power accessories limited company restructuring was established. more than half a century, has always been committed to key parts of the engine development and production of piston rings.     the company has introduced Germany Falko gotz companies design, manufacture and testing of piston ring technology and United Kingdom AE company hard chromium plating technology for piston ring, and sent more than 50 passengers to their learning and training. while the introduction of Germany, Britain, Japan, Switzerland and other countries have the world's advanced level of production equipment and testing instruments for piston ring, developed with the international advanced level of high grade piston ring mass production capability, product quality reaches international advanced level.      through continuous technological transformation of enterprises and scientific research and development has fully mastered the piston ring of modern manufacturing technology, the use of new materials and advanced surface treatment technology, pushed the piston rings to meet continually enhance and emission of engine Euro II and Euro III standards.     enterprises by ISO/TS16949 QS9 000 quality system certification, and establish and implement effective quality management system, with stable and reliable quality assurance and the spirit of constant innovation, continuous improvement of quality of all staff to provide satisfactory products.      in China, virtually to the main large internal-combustion engine manufacturer of products, many products as original accessories and aftermarket parts for export to foreign countries. beginning in 2009, the company invested 200 million Yuan, will be fully completed within two years of equipment, facilities and technology improvement, further enhancing its production capacity and technological capabilities, enhanced follow-up of core competitiveness of enterprises, the company is moving in a new development goal. 。