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经营范围
发明名称
Cemented columbium carbide
摘要
申请公布号
US1947206(A)
申请公布日期
1934.02.13
申请号
US19310515897
申请日期
1931.02.14
申请人
GENERAL ELECTRIC COMPANY
发明人
KELLEY FLOYD C.
分类号
C22C29/06
主分类号
C22C29/06
代理机构
代理人
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