Environmental protection special equipment manufacturing; environmental protection special equipment sales; metal surface treatment and heat treatment processing; spray coating processing; metal structure manufacturing; metal structure sales; metal packaging containers and materials manufacturing; metal packaging containers and materials sales; special equipment manufacturing (excluding licensed professional equipment manufacturing); general equipment manufacturing (excluding special equipment manufacturing); machinery parts and components processing; machinery parts and components sales; mechanical equipment sales; special equipment sales; coating equipment manufacturing; coating equipment sales; mechanical and electrical equipment manufacturing; industrial automatic control system device sales; general mechanical equipment installation services; mechanical equipment leasing; fire-fighting equipment sales; metal product sales; metal material sales; high-performance sealing material sales; anti-corrosion material sales; electronic special material manufacturing; electronic special material sales; hardware product retail; mechanical and electrical equipment sales; valve and cock sales; pump and vacuum equipment sales; automobile sales; automotive parts and accessories retail; wire and cable operation; technical services, technology development, technical consulting, technical exchange, technology transfer, technology promotion; goods import and export; technology import and export; import and export agency; non-residential real estate leasing. Licensed items: construction engineering construction; road motor vehicle production; road cargo transportation (excluding dangerous goods); special equipment design; special equipment manufacturing; special equipment installation, modification and repair; hazardous chemical packaging containers and materials production.