Design of special equipment; inspection and testing of special equipment; manufacturing of special equipment; installation, modification, and repair of special equipment; road cargo transportation (excluding dangerous goods); construction engineering construction; road transportation of dangerous goods; maintenance of railway rolling stock. General items: manufacturing of general equipment (excluding special equipment manufacturing); leasing of special equipment; manufacturing of containers; spray coating processing; repair of containers; manufacturing of metal structures; metal cutting processing services; manufacturing of material handling equipment; manufacturing of coating equipment; sales of mechanical equipment; sales of electrical equipment; manufacturing of metal products for safety and fire protection; repair of general equipment; technical services, technical development, technical consulting, technical exchange, technology transfer, and technology promotion; import and export of goods; labor services (excluding labor dispatch); intelligent control system integration; sales of rail transit specialized equipment, key systems, and parts; sales of material handling equipment; sales of coating equipment; manufacturing of spray guns and similar devices; sales of spray guns and similar devices; installation services for environmental sanitation public facilities; sales of artificial intelligence hardware; sales of intelligent material handling equipment; sales of intelligent basic manufacturing equipment; manufacturing of intelligent basic manufacturing equipment; sales of chemical products (excluding licensed chemical products); sales of building materials; research and development of mechanical equipment; manufacturing of mechanical and electrical equipment; sales of mechanical and electrical equipment; repair of electrical equipment; professional cleaning, disinfection, and sterilization services; sales of containers; research and development of resource recycling technologies; repair of specialized equipment; environmental protection consulting services; urban and rural appearance management; integrated circuit design; professional design services; air pollution control; water environmental pollution prevention services; manufacturing of electronic specialized equipment; metal surface treatment and heat treatment processing; software development; network and information security software development.