DB11/T 1322.88-2019 Part 88 of Technical Specifications for Assessment of Safety Production Level: Petroleum Drilling Engineering Technical Service Enterprises (English Version)
Beijing Provincial Standard of the People's Republic of China
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DB11/T 1322.88-2019
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2019DB11/T 1322.88-2019 Part 88 of Technical Specifications for Assessment of Safety Production Level: Petroleum Drilling Engineering Technical Service Enterprises