장정식 최철림 2024-01-12T18:32:52Z 2024-01-12T18:32:52Z 1993-12-23 https://pubs.kist.re.kr/handle/201004/93753 폴리에틸렌섬유/에폭시　수지　복합재 의　접착력　증진방법 Patent 1993-12-23 1990-06-23 0069145 1990-0009345 KO 특허 한국과학기술연구원