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DE??? ?? ??
?? 5??? ??? ?? ??? ??? ??? ??.
?? ???? ??? ?? ??? ??? ??? ??? ????: ???, ??, ??, ?? ? ?? ??, ??? ??.
International Electrotechnical Commission (IEC), ??? ?? ??
Korean Agency for Technology and Standards (KATS), ??? ?? ??
General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China, ??? ?? ??
American Society for Testing and Materials (ASTM), ??? ?? ??