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公开(公告)号：US3165583A
公开(公告)日：1965-01-12
申请号：US8983161
申请日：1961-02-16
Applicant: BELL TELEPHONE LABOR INC
Inventor： KRETZMER ERNEST R , WINTER RALPH A
IPC: H04L27/10
CPC classification number: H04L27/10
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