海联讯：杭汽轮自主燃机主轴为自主研发设计、自主工艺开发、自主制订制造规范的自主产品

Group 1 - The core viewpoint of the article is that Hailianxun (300277) has developed its own main shaft for the Hangzhou Gas Turbine, which is a product designed, developed, and manufactured independently by the company and its core supply chain [1] Group 2 - The main shaft is characterized by independent research and design, independent process development, and the establishment of manufacturing specifications by the company [1]