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-Business license
-API-6A
-API-16A
-API-16C
-API Specification Q1
-ISO 9001 quality management system certificati…
-Environmental management system certification
-Occupational health and safety management syst…
-Measuring AAA
-Special equipment manufacturing license
-CNAS national laboratory
-MCC Manufacturer Capacity Assessment Report
-CNPC Well Control Qualification-Cassette Head
-CNPC Well Control Qualification-throwing well …
-Service Certificate
-Intellectual property management system certif…
-R&D management system certificate
-AAA Corporate Credit Rating Certificate
-Green factory certification certificate
-Green supply chain grade evaluation certificat…
-Energy Management System Certification Certifi…
-High-tech enterprise technology certificate
-Product Carbon Footprint Certificate
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Green factory certification certificate
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