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公开(公告)号：US2482441A
公开(公告)日：1949-09-20
申请号：US68249146
申请日：1946-07-10
Applicant: ASEA AB
Inventor： NILS SJOBERG
CPC classification number: H01F29/04 , B60L9/26 , B60L2200/26
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