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公开(公告)号：US2462066A
公开(公告)日：1949-02-15
申请号：US51110043
申请日：1943-11-20
Applicant: INT STANDARD ELECTRIC CORP
Inventor： HARRY BRAY FREDERICK , EWART NEWTON FRANK
IPC: H04M19/02
CPC classification number: H04M19/02 , Y10T307/878
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