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公开(公告)号：US2854601A
公开(公告)日：1958-09-30
申请号：US37192853
申请日：1953-08-03
Applicant: INT STANDARD ELECTRIC CORP
Inventor： WILLIAM WRIGHT WALTER , ARUNDEL SMYTH JOHN , DOUGLAS MILLS BERNARD
IPC: H01J19/42
CPC classification number: H01J19/42 , H01J2893/0005
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