???? ???? ‘?????(IS)‘? ’?? ??‘ ??? ???·?? ???? ’??????(SDF)’? ??? ???.
4?(????) SDF ??? ???? ??? “IS? ??? ???? ‘?? ??’? ??? ?? ?? ??? ?? ?”??? ???.
??? ???? SDF? ??? 20??? ? ??? ??? ?? ???????? ???? IS ???? 1??? ?? ???? ?? ? ?? 2? ? ??? ??? ?? ??? ????. ?? IS ??? ???? ?? ???, ??? ??? ???? ?? ??? SDF? ???? ??.
?? ???? “??? ???? ??? ?? ?? ?? ??? ??? ???? ???, ??? ‘??? ??’? ??? ?? ?”??? ???.
4? ?? ?????? SDF? ??? ?? ? ?? IS ???? ? 500?? ?????? AP??? ????.
??? ??? ? ????? ???? ‘????????’? IS ??? ??? ?? ? ??? 150?? SDF? ????? ???.
?【???(???)=AP/???】
[??★???] ??????? ?? ‘???’???!
??? ??? ??? ??
