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公开(公告)号：US2651680A
公开(公告)日：1953-09-08
申请号：US7422249
申请日：1949-02-02
Applicant: INT STANDARD ELECTRIC CORP
Inventor： HARRY BRAY FREDERICK , THAIN WILSON MICHAEL , HENRY ORMROD DOUGLAS , WILLIAM JOHNSTONE STANLEY GEOR
IPC: H04M15/08
CPC classification number: H04M15/08
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