Manufacturing of vibration and noise reduction equipment, noise and vibration control services, sales of vibration and noise reduction equipment, manufacturing of rubber products, sales of rubber products, sales of molds, research and development of mechanical equipment, sales of mechanical equipment, machining of mechanical parts and components, sales of mechanical parts and components, manufacturing of mechanical and electrical equipment, sales of mechanical and electrical equipment, leasing of mechanical equipment, leasing services (excluding licensed leasing services), repair of general equipment, sales of high-speed rail equipment and accessories, manufacturing of auto parts and accessories, manufacturing of railway locomotive and rolling stock parts, installation services for general mechanical equipment, technology services, technology development, technology consulting, technology exchange, technology transfer, technology promotion, manufacturing of specialized equipment (excluding licensed specialized equipment), sales of electronic products, manufacturing of electronic components and electromechanical component equipment, sales of electronic components and electromechanical component equipment, maintenance of electronic and mechanical equipment (excluding special equipment), engineering and technological research and experimental development, research and development of metal products, manufacturing of metal structures, manufacturing of metal processing machinery, manufacturing of general equipment (excluding special equipment), manufacturing of metal tools, sales of metal materials, sales of metal structures, sales of metal products.