爱司凯(300521.SZ)：目前的3D打印设备以砂型打印系列为主，可为相关行业提供砂芯、砂型及金属铸件成品的生产供应

Core Viewpoint - The company focuses on the research and development, production, sales, and service solutions of industrial printing products, particularly in the 3D printing sector [1] Group 1 - The company's 3D printing equipment primarily consists of sand printing series [1] - The company provides production supply of sand cores, sand molds, and metal castings for related industries [1]