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Inspection and evaluation technology of drilling rig and derrick
2020/09
Integrated technical service of oil and casing inspection and repair
2020/09
Oil and gas pipeline internal corrosion and leakage detection technology
2020/09
External corrosion detection technology of oil and gas storage and transportation pipeline
2020/09
Testing and calibration technology of instrument and equipment
2020/09
Testing and grading evaluation technology for drilling tools and wellhead tools
2020/09
Gas seal detection technology
2020/09
Detection and evaluation technology of special equipment
2020/09
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