Wholesale of other mechanical equipment and electronic products; wholesale of hardware products; wholesale of electrical equipment; repair of other professional equipment not listed (excluding items requiring license approval); repair of electrical equipment; repair of general equipment; repair of metal products; repair of other daily products not listed; repair of other machinery and equipment; repair of computers and auxiliary equipment; repair of communication equipment; Other office equipment maintenance; refrigeration and air conditioning equipment manufacturing; packaging special equipment manufacturing; spray gun and similar equipment manufacturing; electronic vacuum device manufacturing; other unspecified electrical machinery and equipment manufacturing; other unspecified manufacturing industries (excluding items subject to license approval); electrical installation; pipeline and equipment installation; other unspecified building installation industries; steel structure engineering construction; Construction engineering technical consulting (excluding cost consulting); other construction industries not listed; provision of construction equipment services; housing construction industry; information technology consulting services; information system integration services; integrated circuit design; engineering and technology research and experimental development; construction project survey and design; project management services; landscape and greening engineering design; professional design services; Other unspecified wholesale industries (excluding business items that require license approval); hardware retail; other interior decoration materials retail; communications equipment retail; other electronic product retail; other unspecified retail industries (excluding items that require license approval); auto parts retail; motorcycle parts retail; trade agents; other trade brokers and agents; Internet sales.