???? 21? ????? ???? ??? 3000?? ??? ABS? ??? ?? 1.4??(1～3?)? ???? ???? ??? ?????? ???.
??? ???? “????? ???? ??? ???? ??????? SPC(??????)? ?? ?? ??? ABS? ??? ???? ???? ??? ???? ??”? ???.
? ???? “?? ABS??? ????? ??? ?? ??? ???? ?? ?? ? 3～4? ??? ?????? ??? ???? ??”? ????.
???? ????? ??? ????? ????? ?? ABS? ???? ???? ????? ???? ??? ???? ???.
nirvana1@donga.com
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