Bearing, gear and transmission component manufacturing; Bearing, gear and transmission component sales; Rail transit specialized equipment, key systems and parts sales; High-speed rail equipment and accessories manufacturing; High-speed rail equipment and accessories sales; Railway rolling stock parts manufacturing; Railway rolling stock parts sales; Wind turbine generator set and parts sales; Generator and generator set manufacturing; Generator and generator set sales; Mechanical parts and components processing; Mechanical parts and components sales; General equipment manufacturing (excluding special equipment manufacturing); Automotive parts and accessories manufacturing; Hydraulic power machinery and element manufacturing; Hydraulic power machinery and element sales; Metal matrix composite and ceramic matrix composite sales; Synthetic material manufacturing (excluding hazardous chemicals); Synthetic material sales; Engineering plastic and synthetic resin manufacturing; Engineering plastic and synthetic resin sales; Electronic special material research and development; Electronic special material manufacturing; Electronic special material sales; Power electronic components manufacturing; Power electronic components sales; Mechanical equipment sales; New material technology research and development; Goods import and export; Technology import and export; Technical services, technology development, technical consultation, technical exchange, technology transfer, technology promotion.