General projects: Technical services, technical development, technical consultation, technical exchange, technology transfer, and technology promotion; Manufacturing of specialized equipment for environmental protection; General equipment manufacturing (excluding special equipment manufacturing), general component manufacturing, special equipment manufacturing (excluding licensed professional equipment manufacturing); Manufacturing of dust removal technology equipment, metallurgical specialized equipment, and metal structure manufacturing; Electric motor manufacturing, battery spare parts production, hardware product manufacturing, and air pollution prevention and control services; Water environment pollution prevention and control services; Environmental protection monitoring: Sales of metal structures; Sales of power facilities and equipment: Sales of micro and special motors and components; Installation services for general mechanical equipment; Sales of battery spare parts, sales of mechanical and electrical equipment, and repair of electrical equipment; Sales of fans and fans, as well as sales of bearings, gears, and transmission components; Processing of Machine element and spare parts; Retail of hardware products (except for projects that require approval according to law, independently carry out business activities with a business license in accordance with the law)