Engineering and technical research and experimental development; Manufacturing of electronic components and electromechanical equipment; Sales of electronic components and electromechanical equipment; Research and development of electromechanical coupling system; Manufacturing of specialized electrical and mechanical equipment; Manufacturing of specialized equipment for semiconductor devices; Manufacturing of electronic specialized equipment; Manufacturing of micro motors and components; Manufacturing of specialized equipment for environmental protection; Manufacturing of electric motors; Motor manufacturing; Manufacturing of power electronic components; Manufacturing of electrical equipment; Manufacturing of mechanical and electrical equipment; Specialized equipment manufacturing