Road motor vehicle production; special equipment manufacturing. General items: electronic product sales; automotive parts wholesale; electrical signal equipment device manufacturing; automotive parts and accessories manufacturing; mechanical and electrical equipment sales; bearing, gear, and transmission component manufacturing; power facility equipment manufacturing; general equipment manufacturing (excluding special equipment manufacturing); special equipment sales; material handling equipment manufacturing; material handling equipment sales; hydraulic power machinery and components sales; hydraulic power machinery and components manufacturing; pneumatic power machinery and components manufacturing; pneumatic power machinery and components sales; general parts manufacturing; mechanical parts and components processing; mechanical parts and components sales; construction engineering machinery sales; tunnel construction specialized machinery sales; tunnel construction specialized machinery manufacturing; specialized equipment manufacturing (excluding licensed specialized equipment manufacturing); electrical machinery specialized equipment manufacturing; security equipment manufacturing; security equipment sales; traffic safety and control specialized equipment manufacturing; metal product sales; metal product repair; general equipment repair; mechanical equipment sales; specialized equipment repair; electrical equipment repair; traffic facility maintenance; industrial robot installation and maintenance; door and window manufacturing and processing; metal structure manufacturing; metal wire rope and its product manufacturing; metal wire rope and its product sales; safety and fire-fighting metal product manufacturing; traffic and public management metal sign manufacturing; traffic and public management sign sales; metal material sales; metal material manufacturing; building material sales; building decoration material sales; rubber product sales; plastic product sales; rail transit engineering machinery and parts sales; rail transit specialized equipment, key systems and parts sales; hardware product retail; wire and cable operation; casting molding material sales; metal structure sales.