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公开(公告)号：US2586771A
公开(公告)日：1952-02-26
申请号：US66010646
申请日：1946-04-06
Applicant: INT STANDARD ELECTRIC CORP
Inventor： MAURICE ARDITI , URBAN WALTER D
IPC: H01J9/12
CPC classification number: H01J9/125 , H01J2201/32
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