Metal material sales; Metal tool manufacturing; Metal tool sales; Non-ferrous metal alloy sales; Professional design services; Metal processing machinery manufacturing; Metal cutting machine tool manufacturing; Metal cutting machine tool sales; High-performance non-ferrous metal and alloy material sales; Machine tool functional component and accessory manufacturing; Machine tool functional component and accessory sales; Mechanical parts and component sales; Mechanical parts and component processing; Metal material manufacturing; Hardware product retail; Hardware product wholesale; Mechanical equipment research and development; Metal product repair; Metal product sales; Metal structure manufacturing; Metal cutting processing services; CNC machine tool manufacturing; CNC machine tool sales; Metal cutting and welding equipment manufacturing; Non-metallic mineral product manufacturing; Non-metallic mineral product sales; Mold sales; Cutting tool manufacturing; Cutting tool sales; Mechanical and electrical equipment sales; Electronic measuring instrument sales; Metal cutting and welding equipment sales; Civil aviation material sales; Goods import and export; Technical services, technology development, technical consultation, technical exchange, technology transfer, technology promotion; Fastener manufacturing; Railway locomotive and rolling stock accessory manufacturing; High-speed rail equipment and accessory manufacturing; High-speed rail equipment and accessory sales.