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ְ . 2 43 Ȧ, , , ȭ 3%~13% ¼. 췹ź () , ȭ ȭ(PVC) ٴ Ѵ. Ȧ ̵ ȸ 9 ȸ縦 Ŵ ִ. ִ ŷ . ð Ȧ 6.4%, 10.5%, ȭ 4.2%, 9.5%.
19
Ģ ü ڿ ̿ Ǹ ݷ̳ , ĺ û ִ â ΰ ˷帳ϴ.
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