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公开(公告)号：US2661435A
公开(公告)日：1953-12-01
申请号：US27083452
申请日：1952-02-09
Applicant: ASEA AB
Inventor： PERCY BERGKNUT GUNNAR , KIESSLING CARL J E
IPC: H02K23/18
CPC classification number: H02K23/18 , Y10T74/19555
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