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公开(公告)号：US2824994A
公开(公告)日：1958-02-25
申请号：US57040056
申请日：1956-03-08
Applicant: GERMESHAUSEN KENNETH J , SEYMOUR GOLDBERG
Inventor： GERMESHAUSEN KENNETH J , SEYMOUR GOLDBERG
IPC: H01J17/06
CPC classification number: H01J17/066
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