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公开(公告)号：US3326350A
公开(公告)日：1967-06-20
申请号：US57325566
申请日：1966-08-18
Applicant: GEN ELECTRIC
Inventor： CROMER WILLIAM R , ARNE MOLBACH
IPC: H01J9/46
CPC classification number: H01J9/46 , H01J2893/0096 , H01J2893/0098
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