송용억 노형민 2024-01-12T21:31:23Z 2024-01-12T21:31:23Z 1999-02-26 https://pubs.kist.re.kr/handle/201004/97019 금형　시제품의　급속　조형을　위한　전기　가열식　금속　박판　용접　방법 Patent 1999-02-26 1997-03-06 0198172 1997-0007428 KO 특허 한국과학기술연구원