Research and development of mechanical equipment; research and development of electronic products; research and development of Internet of Things technology; tire sales; lubricant wholesale; lubricant retail; electronic product sales; mechanical parts sales; general mechanical equipment sales; mechanical equipment leasing; computer network system engineering services; mechanical engineering design services; economic and business consulting services; building materials sales; domestic advertising agency services; smart product sales; smart technology consulting and services; network technology research and development; mechanical technology consulting and exchange services; software development; computer technology development and technical services.
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