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DE?? ??
?? 12??? ?? ??? ??? ??? ??.
?? ???? ?? ??? ??? ??? ??? ????: ? ??, ?? ????, ?? ??.
Professional Standard - Chemical Industry, ?? ??
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ?? ??
(U.S.) Ford Automotive Standards, ?? ??
GCC Standardization Organization, ?? ??
British Standards Institution (BSI), ?? ??
German Institute for Standardization, ?? ??