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公开(公告)号：US2862811A
公开(公告)日：1958-12-02
申请号：US53366355
申请日：1955-09-12
Applicant: STORA KOPPARBERGS BERGSLAGS AB
Inventor： HARALD EKETORP SVEN GUSTAV , HJALMAR BACKSTROM SVEN
IPC: C21C5/56
CPC classification number: C21C5/567 , Y10S75/957
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