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Hangzhou Spring (Zhejiang Blue Rhomb Machinery Co., Ltd) was set up on Apr. 1958 and has specialized in producing spring for 55 years. As a key enterprise, it belonged to national mechanical and electrical industrial department and now, it is a a managing director unit of China General Components Industry Association, vice president unit of China Spring Specialty Association, high and new technology enterprises in national fundamental cultivating industrial area, great renovation enterprise in national mechanical industry, having advantageous prospect of developing enterprise in Yu Hang district.
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