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公开(公告)号：US2434664A
公开(公告)日：1948-01-20
申请号：US46500842
申请日：1942-11-09
Applicant: GEN ELECTRIC
Inventor： MALLOY CATHERINE A
IPC: H01J5/24
CPC classification number: H01J5/24 , H01J2893/0039
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