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公开(公告)号:KR1019890002206A
公开(公告)日:1989-04-08
申请号:KR1019870007856
申请日:1987-07-20
Applicant: 한국과학기술연구원
Inventor: 박상우 , 강용구 , 김동진
IPC: C07F9/52