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1.发明授权
公开(公告)号：US3314781A
公开(公告)日：1967-04-18
申请号：US51283065
申请日：1965-12-07
Applicant: STORA KOPPARBERGS BERGSLAGS AB
IPC: C21C5/30
CPC classification number: C21C5/30 , Y10S261/09
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