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Report -
2.2.5 우레탄(Urethane), 우레아(Urea)계 고분자 -NN--CC--OO--contents.kocw.net/KOCW/document/2015/pusan/kimhongsung/... · 2016-09-09 · 255°C 이나, 카르보닐기의
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