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公开(公告)号：US2219506A
公开(公告)日：1940-10-29
申请号：US16797737
申请日：1937-10-08
Applicant: TELEFUNKEN GMBH
Inventor： KARL STEIMEL , KURT MIE
IPC: H03J3/14
CPC classification number: H03J3/14
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