Business scope: Import And Export Of Goods Or Technology,
Downhole Operation,
Sale,
Technical Consulting,
Technical Services,
Chemical Products,
Building Materials,
Electronic Product,
Plastic Products,
Technology Development,
Cementing Material,
Sales Of Drilling Fluids,
Drilling Fluid Technical Services,
Petroleum Additive Production,
Hardware Material,
Research And Development,
Instrumentation,
Rubber Products,
Oil Recovery Auxiliary,
General Equipment,
...
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