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公开(公告)号：US2812462A
公开(公告)日：1957-11-05
申请号：US35561753
申请日：1953-05-18
Applicant: GEN ELECTRIC
Inventor： MALTBY TRUMAN W , PICKETT HOWARD W
IPC: H01J35/04
CPC classification number: H01J35/04
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