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公开(公告)号：US3309470A
公开(公告)日：1967-03-14
申请号：US32370763
申请日：1963-11-14
Applicant: BELL TELEPHONE LABOR INC
Inventor： MAYER JAMES H , DOREN MITCHELL
IPC: H04B3/46
CPC classification number: H04B3/46
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