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??? ????

?? 4??? ??? ????? ??? ??? ??.

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

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

• KS M 8235-2013 ??(II) ??? n-???
• KS M 8053-2013 ??(I) ??? ????

Japanese Industrial Standards Committee (JISC), ??? ????

• JIS K 8557:1992 ??(III) ??? ????
• JIS K 8558:1992 n-?? ??(II) ???

??:   ????, ??? ????, ?? ???, ?? ???, ??? ???, ??? ???, ???? ???, ???? ???, ????????, ????????, ??? ????, ?? ??, ??? ???, ??? ???, ???? ????, ?? ??, ??? ??, ????, ??? ??, "?? ??".