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DE??? ??
?? 12??? ??? ??? ??? ??? ??.
?? ???? ??? ??? ??? ??? ??? ????: ????, ???, ?? ??, ????.
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ??? ??
HU-MSZT, ??? ??
British Standards Institution (BSI), ??? ??
American Society for Testing and Materials (ASTM), ??? ??