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公开(公告)号：US3103629A
公开(公告)日：1963-09-10
申请号：US16322161
申请日：1961-12-29
Applicant: BELL TELEPHONE LABOR INC
Inventor： DAMEN THEODORE C , HALL WILLIAM G
IPC: H03M1/00
CPC classification number: H03M1/40
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