Special equipment manufacturing (excluding licensed professional equipment manufacturing); general equipment manufacturing (excluding special equipment manufacturing); mechanical equipment research and development; mechanical equipment sales; refrigeration and air conditioning equipment manufacturing; casting machinery manufacturing; metal processing machinery manufacturing; mechanical parts and components sales; intelligent basic manufacturing equipment sales; CNC machine tool sales; coating equipment sales; furnace, kiln and electric furnace sales; packaging special equipment sales; furnace, kiln and electric furnace manufacturing; material handling equipment manufacturing; packaging special equipment manufacturing; general parts manufacturing; metallurgical special equipment manufacturing; coating equipment manufacturing; mold manufacturing; mold sales; electronic and mechanical equipment maintenance (excluding special equipment); special equipment repair; graphene material sales; plastic product manufacturing; plastic product sales; metal material manufacturing; superconducting material manufacturing; electronic special material manufacturing; synthetic material manufacturing (excluding hazardous chemicals); engineering management services; mechanical equipment leasing; non-residential real estate leasing; road freight transport for general cargo vehicles with a total mass of 4.5 tons or less (excluding online freight and dangerous goods); goods import and export; technology import and export; general mechanical equipment installation services; mechanical parts and components processing; information system operation and maintenance services; software development; lighting fixture sales.