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Hebei Provincial Standard of the People's Republic of China, ?? ?? ???

General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ?? ?? ???

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Group Standards of the People's Republic of China, ?? ?? ???

Professional Standard - Petroleum, ?? ?? ???

National Metrological Verification Regulations of the People's Republic of China, ?? ?? ???

Korean Agency for Technology and Standards (KATS), ?? ?? ???

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