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公开(公告)号：US3009025A
公开(公告)日：1961-11-14
申请号：US70413457
申请日：1957-12-20
Applicant: VICTOR COMPANY OF JAPAN
Inventor： KENJIRO TAKAYANAGI , SUSUMN NOMURA
IPC: G11B20/08
CPC classification number: G11B20/08
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