Hangzhou dunpai chain general factory, the forerunner or Hangzhou dunpai chain co.,Ltd,founded in 1951.Through the hardwork of several generations of the company抯 worker and more than 50 years' development, our company has made a splendid history. Our company has won the national'May Day抋ward.08B-2.10A-1 roller chain. which are the leading products of dunpai chain have won the national silver medal again and again since 1980. 16A-1 roller chain also won the national silver medal in 1980. 06B-1, 08A-1, 12A-1, 16A-1 won the name of high quality product or Zhejiang province.