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公开(公告)号：US2882523A
公开(公告)日：1959-04-14
申请号：US35875253
申请日：1953-06-01
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： BARRETT JOHN J , PARDUCCI RALPH R
IPC: H01J5/32
CPC classification number: H01J5/32
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