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公开(公告)号：US2438004A
公开(公告)日：1948-03-16
申请号：US73028047
申请日：1947-02-24
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： MAX GARBUNY , ELMER PAKALA WILLIAM
IPC: H01J13/26
CPC classification number: H01J13/26
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