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公开(公告)号：US2996635A
公开(公告)日：1961-08-15
申请号：US85816459
申请日：1959-12-08
Applicant: INT STANDARD ELECTRIC CORP
Inventor： FRANCIS KLEPP GEORGE , HENRY DALTON OLAF
IPC: H01J17/49
CPC classification number: H01J17/49 , H01J2893/0069
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