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DE??? ? ?? ??? ?????
?? 9??? ??? ? ?? ??? ?????? ??? ??? ??.
?? ???? ??? ? ?? ??? ?????? ??? ??? ??? ????: ??? ??, ??, ??.
German Institute for Standardization, ??? ? ?? ??? ?????
GSO, ??? ? ?? ??? ?????
Korean Agency for Technology and Standards (KATS), ??? ? ?? ??? ?????
British Standards Institution (BSI), ??? ? ?? ??? ?????
American Society for Testing and Materials (ASTM), ??? ? ?? ??? ?????