석유화학, 정밀화학, 석탄화학 설계
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석유화학, 정밀화학, 석탄화학 설계에 도움이 필요하신 분은 메시지를 남겨주세요
이 게시글은 마지막으로 지자밍이 2016-6-11 09:44에 수정했습니다. 위층에 가면 공예 구역도 둘러볼 수 있습니다.거기엔 디자인을 하는 사람들과 도움이 필요한 친구들이 많아요.
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