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公开(公告)号：US1913523A
公开(公告)日：1933-06-13
申请号：US44470330
申请日：1930-04-16
Applicant: ASEA AB
Inventor： ROBERT UGGLA WILHELM
IPC: H02K7/116
CPC classification number: H02K7/116 , Y10T74/19684 , Y10T307/779
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