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发明名称
Improvements in or relating to the production of refractory metals
摘要
申请公布号
GB806272(A)
申请公布日期
1958.12.23
申请号
GB19560033584
申请日期
1956.11.02
申请人
E. I. DU PONT DE NEMOURS AND COMPANY
发明人
JR. CHARLES HENRY WINTER,
分类号
C22B34/12
主分类号
C22B34/12
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代理人
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