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公开(公告)号：US2672586A
公开(公告)日：1954-03-16
申请号：US24969551
申请日：1951-10-04
Applicant: ASEA AB
Inventor： UNO OLSSON
CPC classification number: H01H3/40 , H01H9/0005 , H01H2003/405 , Y10T74/19884
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