General items: general application systems for artificial intelligence; development of basic artificial intelligence software; sale of equipment for the handling of intelligent materials; sale of automatic machines; sale of specialized equipment for money; sale of electronic appliances; sale of equipment for the exclusive use of electronics; sale of refrigeration and air conditioning equipment; repair of general-purpose equipment; sale of intelligent storage equipment; maintenance of computers and office equipment; sale of electronic products; specialized equipment repair of specialized equipment; sale of software; software development; development of artificial intelligence applications; marketing of metal structures; technical services, technology development, technical advice, technology exchange, technology transfer and technology promotion; installation of general machinery equipment; electrical repair of day; retailing of electronic appliances; sale of computing equipment (in ...