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公开(公告)号:KR2019890009054U
公开(公告)日:1989-05-29
申请号:KR2019870017207
申请日:1987-10-05
Applicant: 한국과학기술연구원
Inventor: 신명철 , 김칠성 , 지광구
IPC: F16K17/38