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公开(公告)号：US2422546A
公开(公告)日：1947-06-17
申请号：US57408845
申请日：1945-01-23
Applicant: ASEA AB
Inventor： BROR HANSSON , TURE LJUNGBERG
IPC: H01B17/30
CPC classification number: H01B17/306
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