Railway transportation infrastructure equipment manufacturing; Special equipment installation, modification, and repair; Special equipment manufacturing. General items: Generator and generator set manufacturing; Mechanical equipment research and development; Power generation technical services; Generator and generator set sales; Mechanical equipment sales; Mechanical and electrical equipment sales; Railway transportation infrastructure equipment sales; Railway rolling stock parts sales; High-speed rail equipment and accessories sales; Railway special measurement or inspection instrument sales; Railway transportation auxiliary activities; Fire equipment sales; Refrigeration and air conditioning equipment sales; Power electronic component sales; Hydraulic power machinery and component sales; Wire and cable operations; Lubricating oil sales; Instrument sales; Metal product sales; Electronic components and electromechanical component equipment sales; Industrial control computer and system sales; Computer software and hardware and auxiliary equipment wholesale; Vibration and noise reduction equipment sales; Technical services, technical development, technical consulting, technical exchange, technology transfer, technology promotion; Electrical equipment repair; General equipment repair; General mechanical equipment installation services; Import and export of goods; Special equipment sales; Metal forming machine tool manufacturing; Renewable resource processing; Power distribution switchgear equipment sales; Hardware product retail; Metal tool sales; Mold manufacturing; Mold sales; Metal forming machine tool sales; Security equipment manufacturing; Security equipment sales; General valve and cock manufacturing (excluding special equipment manufacturing)