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公开(公告)号：US3299310A
公开(公告)日：1967-01-17
申请号：US37101164
申请日：1964-05-28
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： FREGGENS ROBERT A
IPC: H01J1/18
CPC classification number: H01J1/18
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公开(公告)号：US3218502A
公开(公告)日：1965-11-16
申请号：US9618861
申请日：1961-03-16
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： FREGGENS ROBERT A
IPC: H01J1/18
CPC classification number: H01J1/18
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