Pumps, valves, mixers, flow promoters, aeration machines, wastewater treatment equipment, integrated pre-fabricated pumping stations, pipelines, water supply treatment equipment, electromechanical equipment, electrical control systems, and related equipment manufacturing, sales, installation, maintenance; electrical equipment installation projects and technical consulting; drainage equipment rental; wholesale and retail of electronic products, hardware, electrical appliances, steel, and rubber products; import and export of goods or technology (excluding goods and technologies prohibited by the state or involving administrative approval procedures); technological development and transfer of pump products and accessories. (Operational activities subject to approval; as permitted by relevant laws and regulations.)