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公开(公告)号：US2665394A
公开(公告)日：1954-01-05
申请号：US16911450
申请日：1950-06-20
Applicant: ASEA AB
Inventor： ALGOT ARVIDSSON , HUGO ELMLUND , GEORG SONESSON
IPC: H05B41/391
CPC classification number: H05B41/391 , Y10T307/297
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