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公开(公告)号：US2251044A
公开(公告)日：1941-07-29
申请号：US35369540
申请日：1940-08-22
Applicant: BELL TELEPHONE LABOR INC
Inventor： FAIRWEATHER BURTON A , TERRY DONALD M
IPC: H04B3/10
CPC classification number: H04B3/10
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