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公开(公告)号：US2884602A
公开(公告)日：1959-04-28
申请号：US59675556
申请日：1956-07-09
Applicant: MARCONI WIRELESS TELEGRAPH CO
Inventor： DAVID SPEAKE GEORGE , BARTHOLOMEW SCANLAN MICHAEL JA , ERIC COTTAM
IPC: H01J17/04
CPC classification number: H01J17/04
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