Road freight transport (excluding dangerous goods). General items: Manufacture of hydraulic power machinery and components; Manufacture of pneumatic power machinery and components; Manufacture of general parts; Machining of mechanical parts and components; Manufacture of special operation robots; Manufacture of general equipment (excluding special equipment); Complete nuclear power equipment and engineering technology research and development; Manufacture of mining machinery; Manufacture of specialized equipment for oil drilling; Manufacture of metallurgical specialized equipment; Manufacture of specialized equipment for oil refining and chemical production; Manufacture of electronic components and electromechanical assemblies; Manufacture of sludge treatment equipment; Manufacture of railway locomotive and rolling stock parts; Manufacture of marine supporting equipment; Manufacture of marine engineering equipment; Manufacture of mechanical and electrical equipment; Manufacture of hardware products; Industrial design services; Manufacture of metal structures.