Graphite and carbon product manufacturing; mechanical and electrical equipment manufacturing; railway rolling stock parts manufacturing; high-speed rail equipment and parts manufacturing; heat and sound insulation material manufacturing; refractory material production; lightweight building material manufacturing; new building material manufacturing (excluding hazardous chemicals); new membrane material manufacturing; synthetic material manufacturing (excluding hazardous chemicals); high-performance fiber and composite material manufacturing; metal seal manufacturing; general parts manufacturing; mechanical parts and components processing; sealing filler manufacturing; asbestos product manufacturing; metal processing machinery manufacturing; general equipment manufacturing (excluding special equipment manufacturing); specialized equipment manufacturing (excluding licensed specialized equipment manufacturing); metal cutting and welding equipment manufacturing; metal forming machine tool manufacturing; new material technology research and development; metal product research and development; mechanical equipment research and development; graphite and carbon product sales; non-metallic mineral product sales; electrical mechanical equipment sales; high-speed rail equipment and parts sales; water transport equipment parts sales; heat and sound insulation material sales; refractory material sales; insulation material sales; lightweight building material sales; building material sales; new membrane material sales; engineering plastic and synthetic resin sales; synthetic material sales; high-performance fiber and composite material sales; metal seal sales; metal product sales; sealing filler sales; asbestos product sales; high-performance sealing material sales; metal forming machine tool sales; mechanical equipment sales; mechanical parts and components sales; metal cutting and welding equipment sales; enterprise management consulting; technical services, technology development, technical consultation, technical exchange, technology transfer, technology promotion. Permitted items: technology import and export; import and export agency; goods import and export.