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公开(公告)号：US3239609A
公开(公告)日：1966-03-08
申请号：US22430362
申请日：1962-09-18
Applicant: BELL TELEPHONE LABOR INC
Inventor： ANDREGG ERNEST R , VOYLES KENNARD E
IPC: H04M17/02
CPC classification number: H04M17/02
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