研制成功，精准落位！这一项目取得关键性突破

Core Points - The successful installation of the first key component, the Dewar base, for the compact fusion energy experimental device (BEST) marks a significant breakthrough in the project's construction [1] - The Dewar base is the heaviest component of the BEST system, weighing over 400 tons, with a diameter of approximately 18 meters and a height of about 5 meters [1] - This component supports nearly 7,000 tons of weight and its installation precision is crucial for the stability and safety of the entire project [1] Technical Achievements - The project team has overcome critical technologies such as high-precision forming and welding, millimeter-level deformation control, and high vacuum sealing [1] - The successful manufacturing and installation of the Dewar base lays a solid foundation for the subsequent installation and debugging of core components of the BEST device [1]