Construction engineering machinery sales; mechanical equipment sales; agricultural machinery sales; mining machinery sales; specialized equipment repair; material handling equipment sales; general equipment repair; bearing, gear and transmission component sales; mechanical and electrical equipment sales; mechanical equipment leasing; construction machinery and equipment leasing; technical services, technical development, technical consulting, technical exchange, technology transfer, technology promotion; auto parts retail; battery parts and accessories sales; mechanical parts and components sales; agricultural, forestry, animal husbandry and fishery machinery parts sales; lubricating oil sales; chemical product sales (excluding licensed chemical products); rubber product sales; tire sales; seal sales; wire and cable operation; hardware product retail; coating sales (excluding hazardous chemicals); new energy original power equipment sales; general mechanical equipment installation services; hydraulic power machinery and component sales; rail transit engineering machinery and component sales; electronic and mechanical equipment maintenance (excluding specialized equipment); mechanical parts and components processing; agricultural, forestry, animal husbandry and fishery specialized machinery installation and repair; intelligent agricultural machinery equipment sales; environmental protection specialized equipment sales; intelligent material handling equipment sales; building material sales; technical glass product sales; metal structure sales; office supplies sales; daily-use department store sales; office equipment consumables sales; instrument sales; agricultural, forestry, animal husbandry, fishery specialized machinery sales; labor services (excluding labor dispatch); labor protection products sales; battery sales; building cleaning services; professional cleaning, washing and disinfection services; electrical equipment repair; earthwork engineering construction; intelligent vehicle equipment sales; intelligent basic manufacturing equipment sales; new energy vehicle electrical accessory sales; charging pile sales; electronic components and electromechanical component equipment sales; railway locomotive vehicle parts sales; pneumatic power machinery and component sales; internet equipment sales; intelligent instrument sales; construction steel bar product sales; tram sales; power facility equipment sales; generator and generator set sales; motor vehicle repair and maintenance; information consulting services (excluding licensed information consulting services); electrical equipment sales; fire-fighting equipment sales; electric vehicle charging infrastructure operation; mechanical equipment R&D; petroleum product sales (excluding hazardous chemicals).