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公开(公告)号：US2635957A
公开(公告)日：1953-04-21
申请号：US7898849
申请日：1949-03-01
Applicant: STORA KOPPARBERGS BERGSLAGS AB
Inventor： STURE KALLING BO MIKAEL , LOUIS AMEEN EINAR , LUDVIG STALHED JOHN
IPC: C21B13/00
CPC classification number: C21B13/0073 , Y02P10/122 , Y02P10/136
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