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公开(公告)号：KR1019890012895A
公开(公告)日：1989-09-20
申请号：KR1019890001422
申请日：1989-02-08
Applicant: 스미토모덴키고교가부시키가이샤
IPC: C03B37/027
Abstract: 내용 없음.
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