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公开(公告)号：US2524213A
公开(公告)日：1950-10-03
申请号：US1223448
申请日：1948-03-01
Applicant: REMINGTON RAND INC
Inventor： WALES JR NATHANIEL B
IPC: H01J17/48
CPC classification number: H01J17/48 , H01J2893/007
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