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?? 2??? ??????????? ??? ??? ??.

?? ???? ??????????? ??? ??? ??? ????: ?? ??.

Korean Agency for Technology and Standards (KATS), ??????????

• KS M 8360-2020 ??????????

Group Standards of the People's Republic of China, ??????????

• T/CSTM 00069-2019 ?? ?? ??????????(??????)

??:   ???????, ??????????(??????).