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公开(公告)号：US3086081A
公开(公告)日：1963-04-16
申请号：US80525759
申请日：1959-04-09
Applicant: BELL TELEPHONE LABOR INC
Inventor： CATH PIETER G , HILL LESTER O
IPC: H04M17/02
CPC classification number: H04M17/02
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