신명철 손근용 정영훈 2024-01-12T18:32:46Z 2024-01-12T18:32:46Z 1995-04-07 https://pubs.kist.re.kr/handle/201004/93745 알루미늄－리튬　합금의　열처리　방법 Patent 1995-04-07 1991-02-15 1919611 3-22077 JA 특허 한국과학기술연구원