윤창구 2024-01-12T10:35:50Z 2024-01-12T10:35:50Z 1978-10-26 https://pubs.kist.re.kr/handle/201004/84700 알루미나　추출을　위한　소결법 Patent 1978-10-26 1977-01-24 5904 77-133 KO 특허 한국과학기술연구원