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                                     Sum of cards - self-locking nuts, China's top brands! 
                                     Zhejiang Strong company was founded in 1988, was set up in the East China Sea, convenient transportation and pleasant climate, "China Auto with capital" - Ryan. The company introduced the most advanced multi-station cold extrusion machine, the annual output 16,000 tons. 
                                     The company has advanced equipment and strong technical force, has passed the ISO9001-2000.ISO/TS16949 international quality management system certification and ISO14001: 2004 Environmental Management System certification. 
                                     The company produces the "Sum of the card," the self-locking nuts in 1998, supporting manufacturers add Wuyang - Honda's research and development department, "Honda Marine Room" brand is recognized qualified in Wuyang - Honda matching process was rated exempt products. The main supporting units Guangzhou - Honda, Jiangmen Grand River Group companies and other brand manufacturers.

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