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公开(公告)号:US3353384A
公开(公告)日:1967-11-21
申请号:US40652964
申请日:1964-10-26
Applicant: ASEA AB
Inventor: PER KAIN , VILMOS TOROK
IPC: B21B35/04 , B21B37/46 , H02P5/68
CPC classification number: B21B37/46 , B21B35/04 , H02P5/68