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公开(公告)号：US3275755A
公开(公告)日：1966-09-27
申请号：US32161763
申请日：1963-11-05
Applicant: BELL TELEPHONE LABOR INC
Inventor： HALL NORRIS R , HAM JR JAMES H , HOSTETLER WILLARD E , HUTCHINSON KENNETH O , STROMMEN LAWRENCE A
IPC: H04M1/276
CPC classification number: H04M1/276
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