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公开(公告)号：US3082346A
公开(公告)日：1963-03-19
申请号：US3015460
申请日：1960-05-19
Applicant: GEN ELECTRIC
Inventor： HAWKINS DARYL W
IPC: H01J7/18
CPC classification number: H01J7/186
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公开(公告)号：US3278788A
公开(公告)日：1966-10-11
申请号：US21006562
申请日：1962-07-16
Applicant: GEN ELECTRIC
Inventor： HAWKINS DARYL W
IPC: H01J21/06
CPC classification number: H01J21/065
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