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公开(公告)号：US3252588A
公开(公告)日：1966-05-24
申请号：US36058164
申请日：1964-04-17
Applicant: GEN ELECTRIC
Inventor： ALTENBURGER EUGENE G
IPC: H01J9/46
CPC classification number: H01J9/46 , H01J2893/0096
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