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公开(公告)号：US2228064A
公开(公告)日：1941-01-07
申请号：US34783240
申请日：1940-07-27
Applicant: TELEFUNKEN GMBH
Inventor： WILHELM RUNGE , OTTO ROOSENSTEIN HANS , WERNER FOGY
IPC: H03D1/08
CPC classification number: H03D1/08
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