General projects: technical services, technology development, technical advice, exchange, technology transfer, technology promotion; the manufacture of noise-reducing equipment; the sale of noise and vibration control services; the sale of high-capacity sealed materials; the sale of sealed fillings; the sale of rubber products; the sale of mechanical equipment; the development of mechanical equipment; the manufacture of five gold products; the retailing of five gold products; the production of five gold products; the development of five gold products; the construction of metal structures; the sale of metal equipment; the sale of specialized electronic equipment; the manufacture of electronic equipment; the sale of electronic appliances and mechanical components; the installation of general mechanical equipment; and the construction of industrial engineering services (in addition to the licensing activities authorized by law)