Machinery and equipment sales;

Valves and cocks sales;

Pump and vacuum equipment sales;

Instrument sales;

Sales of electronic products;

Computer hardware and software and auxiliary equipment wholesale;

Retail of computer hardware, software and auxiliary equipment;

Hardware retail;

Hardware products wholesale;

Sales of electronic components and electromechanical components;

Sales of power facilities and equipment;

Metallurgical special equipment sales;

Metal products sales;

Sales of special equipment for environmental protection;

Pipeline transportation equipment sales;

Metal material sales;

Import and export of goods;

Technology import and export;

Import and export agent.