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DE?? ??
?? 15??? ?? ??? ??? ??? ??.
?? ???? ?? ??? ??? ??? ??? ????: ????, ?? ??, ???.
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ?? ??
American Society for Testing and Materials (ASTM), ?? ??
British Standards Institution (BSI), ?? ??
Danish Standards Foundation, ?? ??
Korean Agency for Technology and Standards (KATS), ?? ??
VN-TCVN, ?? ??
International Organization for Standardization (ISO), ?? ??
GCC Standardization Organization, ?? ??