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公开(公告)号:JPS6018518B2
公开(公告)日:1985-05-10
申请号:JP2320774
申请日:1974-02-27
Applicant: ASEA AB
Inventor: SUTEN TORORE
IPC: B21D5/01 , B21D37/04 , B30B1/32 , B30B1/34 , B30B15/00 , B30B15/04