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公开(公告)号：US3031135A
公开(公告)日：1962-04-24
申请号：US81914459
申请日：1959-06-09
Applicant: BELL TELEPHONE LABOR INC
Inventor： DIMOND THOMAS L , WYCKOFF ALBERT C
IPC: H04M15/38
CPC classification number: H04M15/38
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