Design and production: Tooling tools, abrasive tools, welding and cutting equipment and accessories, mechanical accessories (excluding special equipment, not allowed to engage in production business in this residence); Technology development, technology transfer, technology consultation and technology service of robots and intelligent devices; Leasing and installation of mechanical and electrical equipment (excluding automobiles and special equipment, it is not allowed to engage in installation business in this residence); Wholesale: Mechanical and electrical products, hardware and electrical products, instrumentation, electronic products, mechanical equipment, cutting tools and measuring tools, environmental sanitation equipment, printed products, labor protection products, chemical products (excluding dangerous goods), metal materials (excluding rare and precious metals), building materials, rubber products, wires and cables, communication equipment (excluding radio transmitting and satellite ground receiving facilities) Import and export of mechanical equipment and accessories and technical import and export( Projects that need to be approved according to law can be operated only after being approved by relevant departments. )