Special equipment manufacturing; special equipment design; special equipment inspection and testing; special equipment installation, modification, and repair; construction engineering construction; specialized professional operations. General items: special equipment sales; special equipment leasing; material handling equipment manufacturing; material handling equipment sales; intelligent material handling equipment sales; metallurgical special equipment manufacturing; metallurgical special equipment sales; nuclear power equipment complete sets and engineering technology research and development; mechanical and electrical equipment manufacturing; mechanical and electrical equipment sales; specialized equipment manufacturing (excluding licensed specialized equipment manufacturing); general parts manufacturing; gear and gear reduction and transmission manufacturing; industrial internet data services; IoT equipment manufacturing; intelligent control system integration; motor manufacturing; motor and its control system research and development; industrial automatic control system device manufacturing; industrial automatic control system device sales; artificial intelligence basic software development; artificial intelligence industry application system integration services; software development; technology import and export; goods import and export; tunnel construction special machinery sales; tunnel construction special machinery manufacturing; construction engineering machinery sales; metal structure manufacturing; metal structure sales; mechanical equipment sales; mechanical equipment leasing; general mechanical equipment installation services; railway locomotive vehicle parts sales; railway transportation equipment sales; railway transportation infrastructure equipment sales; high-speed rail equipment and parts sales; anti-corrosion material sales.