안규홍 맹승규 박기영 2024-01-12T21:00:56Z 2024-01-12T21:00:56Z 2005-06-14 https://pubs.kist.re.kr/handle/201004/96413 나선형　배플　장착　자외선　접촉장치 및　이를　이용한　하수처리장　방류수　재이용　시스템 Patent 2005-06-14 2003-12-05 0496766 2003-0088069 KO 특허 한국과학기술연구원