김민철 배귀남 2024-01-12T23:32:33Z 2024-01-12T23:32:33Z 2004-12-21 https://pubs.kist.re.kr/handle/201004/99374 호흡성　분진　포집장치 Patent 2004-12-21 2003-01-13 0464161 2003-0002140 KO 특허 한국과학기술연구원