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公开(公告)号：US3131037A
公开(公告)日：1964-04-28
申请号：US3913260
申请日：1960-06-27
Applicant: STORA KOPPARBERGS BERGSLAGS AB
Inventor： HJALMAR BACKSTROM SVEN , SUNE BERGLOV ERIK
IPC: F23C99/00
CPC classification number: F23C99/00 , F23C2700/023
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