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1.发明授权
公开(公告)号：US3374113A
公开(公告)日：1968-03-19
申请号：US42527965
申请日：1965-01-13
Applicant: BELL TELEPHONE LABOR INC
Inventor： CHANG JAMES T H , GIANOLA UMBERTO F , SAGAL MATTHEW W
IPC: H01F10/14
CPC classification number: H01F10/14
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