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DE??? ??
?? 21??? ??? ??? ??? ??? ??.
?? ???? ??? ??? ??? ??? ??? ????: ??, ???? ? ?? ??, ?? ?? ??, ????.
British Standards Institution (BSI), ??? ??
German Institute for Standardization, ??? ??
International Organization for Standardization (ISO), ??? ??
Association Francaise de Normalisation, ??? ??
KR-KS, ??? ??
Korean Agency for Technology and Standards (KATS), ??? ??
Spanish Association for Standardization (UNE), ??? ??
Beijing Provincial Standard of the People's Republic of China, ??? ??
American Society for Testing and Materials (ASTM), ??? ??
SCC, ??? ??
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ??? ??