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公开(公告)号:KR2019890007905U
公开(公告)日:1989-05-18
申请号:KR2019870016796
申请日:1987-09-30
Applicant: 삼성전기주식회사
Inventor: 정연호
IPC: H01F38/42
公开(公告)号:KR2019880020768U
公开(公告)日:1988-11-30
申请号:KR2019870006431
申请日:1987-04-30