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经营范围
发明名称
Procédé de traitement de substances contenant du tantale et du niobium
摘要
申请公布号
FR846584(A)
申请公布日期
1939.09.20
申请号
FRD846584
申请日期
1938.11.24
申请人
SOCIETE GENERALE METALLURGIQUE DE HOBOKEN
发明人
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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