02. 생분해성 플라스틱이란 무엇인가 - 프로팩

2020 2:34
Synopsis
01. #생분해성플라스틱 #원료생산과정 (1).#원재료 혼합 원재료인 PBAT(대체플라스틱), 탄산칼슘, PLA(#옥수수젖산)를 일정 비율로 ...
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