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公开(公告)号：US2440308A
公开(公告)日：1948-04-27
申请号：US59994545
申请日：1945-06-16
Applicant: US SEC WAR
Inventor： STORCK EDWARD A
IPC: H01J19/02
CPC classification number: H01J19/02 , H01J2893/0001
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