博云新材：公司主要从事航空机轮刹车系统及刹车材料等产品的研发、生产与销售

Group 1 - The company, Boyun New Materials (002297), primarily engages in the research, production, and sales of aviation wheel brake systems and brake materials, aerospace carbon/carbon composite materials, high-performance hard alloys, and rare metal powder materials [1]