Motor manufacturing; electric motor manufacturing; machining of mechanical parts and components; metal structure manufacturing; mold manufacturing; metal tool manufacturing; sales of wind turbine generators and parts; electrical equipment sales; sales of micro and special motors and components; sales of special equipment; sales of generators and generator sets; sales of electrical materials; sales of mechanical equipment; wire and cable operations; sales of mechanical parts and components; sales of bearings, gears, and transmission components; manufacturing of bearings, gears, and transmission components; sales of building materials; research and development of motors and their control systems; technical services, technical development, technical consulting, technical exchange, technology transfer, technology promotion; certification consulting; manufacturing of hydraulic power machinery and components; integrated circuit design; general equipment repair; special equipment repair; electrical equipment repair; manufacturing of pumps and vacuum equipment; sales of mechanical and electrical equipment; manufacturing of mechanical and electrical equipment; sales of onshore wind turbine generators; sales of offshore wind turbine generators; sales of gears, gear reducers, and gearboxes; sales of fans and blowers; sales of gas compression machinery; sales of hydraulic power machinery and components; sales of valves and cocks; sales of industrial automatic control system devices; sales of pumps and vacuum equipment; research and development of mechanical equipment; manufacturing of metallurgical special equipment; steel rolling and processing; sales of metallurgical special equipment; production of bearing steel products; non-ferrous metal rolling and processing; sales of metal chains and other metal products; production of chemical products (excluding licensed chemical products); sales of chemical products (excluding licensed chemical products); auxiliary activities for railway transportation; sales of railway transportation equipment; sales of railway transportation infrastructure equipment; sales of high-speed rail equipment and accessories; manufacturing of high-speed rail equipment and accessories; sales of railway rolling stock; manufacturing of railway rolling stock parts; sales of railway rolling stock parts.