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公开(公告)号：US2743393A
公开(公告)日：1956-04-24
申请号：US43165254
申请日：1954-05-24
Applicant: DUNLEE CORP
Inventor： ATLEE ZED J , HALLOCK ARCHIE C
IPC: H01J19/42
CPC classification number: H01J19/42 , H01J2893/0002
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