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公开(公告)号：US1998822A
公开(公告)日：1935-04-23
申请号：US67383833
申请日：1933-06-01
Applicant: BELL TELEPHONE LABOR INC
Inventor： RONCI VICTOR L , ELBERT EDWARD F
IPC: H01H51/28
CPC classification number: H01H51/287
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