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公开(公告)号：US3148056A
公开(公告)日：1964-09-08
申请号：US21623362
申请日：1962-08-10
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： IVOR BRODIE , FEASTER GENE R
IPC: H01J9/04
CPC classification number: H01J9/047 , Y10T428/12153
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