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公开(公告)号：US2398422A
公开(公告)日：1946-04-16
申请号：US46019742
申请日：1942-09-30
Applicant: RAYTHEON MFG CO
Inventor： GERMESHAUSEN KENNETH J
IPC: H01J13/48
CPC classification number: H01J13/48 , H01J2893/0087
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