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发明名称
Verfahren zur Gewinnung von Niob aus niobhaltigem Kalkstien
摘要
申请公布号
DE962751(C)
申请公布日期
1957.04.25
申请号
DE1953G011028
申请日期
1953.02.24
申请人
GESELLSCHAFT FUER ELEKTROMETALLURIGE M.B.H.
发明人
FUCHS DIPL.-ING. ALFONS
分类号
C22B34/24
主分类号
C22B34/24
代理机构
代理人
主权项
地址
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