General project: Manufacturing of pumps and vacuum equipment; Sales of pumps and vacuum equipment; Valve and plug development; Sales of valves and cocks; Manufacturing of ordinary valves and cocks (excluding special equipment manufacturing); Manufacturing of water quality pollutant monitoring and detection instruments and meters; Sales of water quality pollutant monitoring and detection instruments and meters; Manufacturing of specialized machinery and equipment for water resources; Manufacturing of ecological and environmental materials; Sales of ecological and environmental materials; Manufacturing of specialized environmental protection equipment; Manufacturing of fiberglass and its products; Manufacturing of specialized equipment for refining and chemical production; Sales of specialized equipment for refining and chemical production; Manufacturing of gas and liquid separation and purification equipment; Manufacturing of industrial automatic control system devices; Sales of gas and liquid separation and purification equipment; Sales of specialized environmental protection equipment; Manufacturing of distribution switch control equipment; Sales of distribution switch control equipment; Municipal facility management; General equipment manufacturing (excluding special equipment manufacturing); Sales of mechanical parts and components; Specialized equipment manufacturing (excluding licensed professional equipment manufacturing); Sales of mechanical equipment; General equipment repair; Mechanical parts and component processing; Technical services, technology development, technology consulting, technology exchange, technology transfer, and technology promotion; Research and development of distribution switch control equipment; Development of intelligent water management system; Engineering and technical research and experimental development; Complete sets of nuclear power equipment and engineering technology research and development; Research and development of key technologies for waste heat power generation; Rese