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公开(公告)号：US3259790A
公开(公告)日：1966-07-05
申请号：US13532361
申请日：1961-08-31
Applicant: VARIAN ASSOCIATES
Inventor： GOLDFINGER ARTHUR A
IPC: H01J3/02 , H01J23/065 , H01J25/12
CPC classification number: H01J23/065 , H01J3/029 , H01J25/12
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