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公开(公告)号:KR1019880012732A
公开(公告)日:1988-11-28
申请号:KR1019870004230
申请日:1987-04-30
Applicant: 박재학 , 주식회사청우기연
Inventor: 박재학 , 주식회사청우기연
IPC: C09K21/02
Abstract: 내용 없음