Technology import and export; goods import and export; container manufacturing; container sales; container repair; container leasing services; material handling equipment manufacturing; special equipment sales; general parts manufacturing; processing of mechanical parts and components; sales of mechanical parts and components; general equipment manufacturing (excluding special equipment manufacturing); sales of metal packaging containers and materials; domestic trade agency; technical services, technology development, technical consulting, technology exchange, technology transfer, technology promotion; manufacturing of mechanical and electrical equipment; manufacturing of power distribution switchgear equipment; manufacturing of metal structures; manufacturing of environmental protection specialized equipment; manufacturing of marine engineering equipment; manufacturing of railway locomotive and rolling stock parts.