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公开(公告)号:US2952793A
公开(公告)日:1960-09-13
申请号:US68669157
申请日:1957-09-27
Applicant: ITT
Inventor: MERRILL LESLIE C
CPC classification number: H01J17/44 , H01J17/40 , H01J61/64 , H01J2893/0067
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公开(公告)号:US2952793A
公开(公告)日:1960-09-13
申请号:US68669157
申请日:1957-09-27
Applicant: ITT
Inventor: MERRILL LESLIE C
CPC classification number: H01J17/44 , H01J17/40 , H01J61/64 , H01J2893/0067