General items: Technical services, technology development, technical consultation, technical exchange, technology transfer, technology promotion: Pump and vacuum equipment sales: Pump and vacuum equipment manufacturing: Mechanical and electrical equipment sales: Mechanical equipment research and development: Mechanical equipment sales: General equipment manufacturing (excluding special equipment manufacturing): Valve and plug sales: Valve and plug research and development: Ordinary valve and plug manufacturing (excluding special equipment manufacturing): Gears and gear reduction, gearbox sales; Sales of bearings, gears and transmission components; Electronic components retail: Fans, fan sales: Fans, fan manufacturing; Wholesale of hardware products; Hardware product research and development; General equipment repair: Gas compression machinery sales; Gas compression machinery manufacturing; Industrial Automatic Control System Device Sales: Special Equipment Sales: Lubricating Oil Sales: Import and Export of Goods. (Except for projects that must be approved according to law, independently carry out business activities according to law on the basis of business license)