Manufacturing of packaging专用 equipment; Sales of packaging专用 equipment; Research and development of mechanical equipment; Sales of mechanical equipment; Leasing of mechanical equipment; Manufacturing of specialized machinery for building materials production; Installation services for general mechanical equipment; Manufacturing of specialized equipment (excluding licensed specialized equipment); Manufacturing of general equipment (excluding special equipment); Repair of general equipment; Manufacturing of hardware products; Research and development of hardware products; Retail of hardware products; Manufacturing of dust removal technical equipment; Sales of environmental protection专用 equipment; Manufacturing of environmental protection专用 equipment; Sales of instruments and meters; Manufacturing of instruments and meters; Manufacturing of industrial automatic control system devices; Sales of industrial automatic control system devices; Manufacturing of rubber products; Sales of rubber products; Information technology consulting services; Manufacturing of construction engineering machinery; Sales of construction engineering machinery; Leasing of construction engineering machinery and equipment; Industrial engineering design services; Manufacturing of metal structures; Manufacturing of material handling equipment; Sales of material handling equipment; Manufacturing of general feeding and distribution devices; Sales of general feeding and distribution devices; Road freight transportation for general cargo vehicles with a total mass of 4.5 tons or less (excluding network freight and dangerous goods); Import and export of goods; Import and export of technologies; Repair of specialized equipment; Repair of metal products; Retail of electronic components; Sales of mechanical and electrical equipment; Repair of electrical equipment; Sales of mechanical parts and components; Processing of mechanical parts and components. Licensed items: Construction engineering construction; Electrical installation services.