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公开(公告)号：US3023555A
公开(公告)日：1962-03-06
申请号：US84696759
申请日：1959-10-16
Applicant: RCA CORP
Inventor： SCHESCH CARL G
IPC: H01J19/00
CPC classification number: H01J19/00 , H01J2893/0026
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