Business scope: Downhole Tools,
Production And Sales,
Software And Accessories,
Computer Network Production,
Pipe Fitting Valve,
Oil And Water Well Technical Services,
Petroleum Machinery Equipment And Accessories,
Teaching Aid Sales,
Computer Technology Services,
Communication Equipment,
Petroleum Machinery And Equipment,
Exploration Technical Services,
Computers And Peripherals,
Research And Development Of Environmental Protection Equipment,
Precursor Chemicals,
Labor Protection Supplies,
Electronics,
Research And Development Of Energy Saving And Environmental Protection Equipment,
Software And Hardware Product Development,
Decorative Material,
Industrial Measurement And Control Products
...