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公开(公告)号：US2285126A
公开(公告)日：1942-06-02
申请号：US28702039
申请日：1939-07-28
Applicant: RCA CORP
Inventor： RAJCHMAN JAN A , SNYDER JR RICHARD L
CPC classification number: H01J43/12 , H01J19/28 , H01J2893/0013
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