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See Chinese contents: Q/BQB 232-2018 Q/BQB 232-2018: Seamless Steel Pipe for Perforating Guns for Oil and Gas Wells
The content that is stipulated in Q/BQB 232-2018 Seamless Steel Pipe for Perforating Guns for Oil and Gas Wells, which was formulated and published by our company, complies with relevant national laws and regulations, and requirements in compulsory standards and relevant industrial policies.
