Zhejiang Xindeda Special Pipe Industry Co., Ltd. was founded in 1997, covering an area of 30,000 square meters. Its holding companies include Wenzhou Xindeda Special Ma- terials Co., Ltd., Zhejiang Honghua Special Steel Technology Co., Ltd., and Zhejiang Chengdeda Stainless Steel Co., Ltd. . National high-tech enterprise, established in the pro- vince Level postdoctoral workstation, jointly cultivates postdoctoral fellows with the Institute of Metal Research, Chinese Academy of Sciences and Zhejiang University. It is a company specializing in the production of special nickel-based alloy···