德恩精工：公司控股子公司德恩航天的经营范围涵盖新材料技术研发、有色金属铸造等

Group 1 - The core viewpoint of the article is that the company Deen Precision Engineering has outlined the business scope of its subsidiary, Deen Aerospace, which includes various advanced manufacturing and technology services [1] Group 2 - The general business activities of Deen Aerospace include research and development in new materials technology, non-ferrous metal casting, additive manufacturing, 3D printing services, and sales of 3D printing base materials [1] - The company is also involved in the manufacturing of high-performance fibers and composite materials, marine equipment manufacturing, and processing of mechanical parts and components [1] - The licensed projects of Deen Aerospace include research and manufacturing of rocket launch equipment and rocket engines, which require approval from relevant authorities before operations can commence [1]