Special equipment manufacturing; Civil air defense engineering protection equipment sales. General items: Industrial robot manufacturing; Professional cleaning, washing, and disinfection services; Artificial intelligence hardware sales; New energy original equipment sales; Hardware product manufacturing; Pump and vacuum equipment sales; Generator and generator set sales; Daily necessities production special equipment manufacturing; Tunnel construction special machinery sales; Offshore wind turbine generator set sales; General equipment manufacturing (excluding special equipment manufacturing); Hydraulic power machinery and component sales; Metal forming machine tool sales; Power facility equipment manufacturing; Hand cart and livestock traction vehicle sales; CNC machine tool sales; Metal chain and other metal product sales; Household appliance sales; Calculator equipment sales; Machine tool functional parts and accessory manufacturing; Coating equipment manufacturing; Machine tool functional parts and accessory sales; Mechanical parts and components processing; Wood and bamboo processing machinery manufacturing; Electronic component wholesale; Construction engineering machinery manufacturing; Mechanical parts and components sales; Tunnel construction special machinery manufacturing; Construction engineering machinery sales; Rail transit special equipment, key systems and component sales; Optical cable sales; Cultural and office equipment manufacturing; Traffic facility maintenance; General equipment repair; Solar thermal utilization product sales; Industrial textile product manufacturing; Marine supporting equipment manufacturing; Wind turbine generator set and component sales; Electronic components and electromechanical component equipment sales; Bearing, gear, and transmission component sales; Metal processing machinery manufacturing; Synthetic material sales; Onshore wind turbine generator set sales; Electrical machinery special equipment manufacturing; Fire-fighting equipment sales; Building materials production special machinery manufacturing; Bearing, gear, and transmission component manufacturing; Gear and gearbox sales; Metal structure sales; Mold sales; Pneumatic and electric tool sales; Metallurgical special equipment manufacturing; Electronic vacuum device sales; General component manufacturing; Mechanical equipment research and development; Mechanical and electrical equipment sales; Casting machinery manufacturing; Industrial automatic control system device sales; Mechanical equipment sales; Import and export of goods; Pump and vacuum equipment manufacturing.