Our patented technology needs further research and application. At the same time, we also need to invest in the construction of a supporting equipment processing plant, and test the promotion and application of new technology and engine muffler when necessary. We sincerely look forward to the investment and cooperation of domestic and foreign enterprises, mutual benefit and common development. 1、 Non ferrous metals nickel and nickel alloy, copper and copper alloy, zirconium and zirconium alloy, tantalum and high-grade stainless steel and dual phase steel welding research, metallographic chart compilation and analysis; second, non-ferrous metals and high-grade stainless steel, dual phase steel corrosion research, automatic welding research, welding program development; third, tube expansion, strength expansion: (1) tubesheet cutting, how to ensure cutting accuracy; (2) hydraulic pressure Expansion head: a muffler design small straight and deep hole cutting, how to quickly process; B. Gaozhuang rubber bag, material selection, how to process; 4, tubesheet processing: how to ensure the tubesheet cutting accuracy; 5, special material equipment surface treatment, such as polishing, grinding, pickling, etc.; 6, barrel rolling: how to roll the large cylinder with taper.