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公开(公告)号：US2030122A
公开(公告)日：1936-02-11
申请号：US59225232
申请日：1932-02-11
Applicant: RCA CORP
Inventor： FREDERIK STRAUB WILLEM , JOHANNES LEMMENS HENDRICUS
IPC: H01G9/02
CPC classification number: H01G9/02
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