长江材料(001296.SZ)：有生产用于砂型3D打印的3D打印砂

Group 1 - The company, Changjiang Materials (001296.SZ), has announced its production of 3D printing sand used for sand mold 3D printing [1] - The company plans to expand its 3D printing sand products and provide sample trial services to customers by integrating 3D printing technology [1] - The focus is on enhancing the application of related technologies and products in the casting industry [1]