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公开(公告)号：US2325603A
公开(公告)日：1943-08-03
申请号：US24188838
申请日：1938-11-23
Applicant: RAYTHEON MFG CO
Inventor： JOSEPH GERMESHAUSEN KENNETH
IPC: H01J13/48
CPC classification number: H01J13/48 , H01J2893/0087
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