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公开(公告)号：US2459859A
公开(公告)日：1949-01-25
申请号：US58442245
申请日：1945-03-23
Applicant: STANDARD TELEPHONES CABLES LTD
Inventor： SIMEON WESTON
CPC classification number: H01J21/36 , H01J19/38 , H01J2893/0016
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