‘????? ??? ?,? ??? ?????.’
??? ????? ???? ???(??)? 4? ‘????? ??―? ??? ?? ??? ??’??? ??? ???? ??? ??.
?? ‘? ??? ??? ??? 1?3??? ???? ?? ??????? ????? ?? 10～15%? ??? ??? ? ????? ??? 5%? ????? ????’? ??.
?? 8? ?? ????????? 3?m ??? ???? ??? ????? 1?m ?????? ??? ???? ??? ???? ???? ?? ??? ???? ???(HES)? ????? ??? ??????? ?? ‘???? ??’? ??? ??? ???.〈??DPA??〉