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1.发明授权
公开(公告)号：US3359482A
公开(公告)日：1967-12-19
申请号：US45774865
申请日：1965-05-21
Applicant: ASEA AB
Inventor： JARLE SLETBAK , GUNNAR NILLSON , LARS-GORAN VIRSBERG
CPC classification number: G01R31/34 , H02M5/00 , H02M5/32 , Y10T307/852
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