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DE?? ??
?? 12??? ?? ??? ??? ??? ??.
?? ???? ?? ??? ??? ??? ??? ????: ??, ????, ???, ???? ? ?? ????.
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ?? ??
American Society for Testing and Materials (ASTM), ?? ??
Professional Standard - Petrochemical Industry, ?? ??