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经营范围
发明名称
Production of powdered iron
摘要
申请公布号
US2818328(A)
申请公布日期
1957.12.31
申请号
US19540446278
申请日期
1954.07.28
申请人
FRANCIS CHARLES B
发明人
FRANCIS CHARLES B.
分类号
B22F9/22;C21B13/00;C21B13/04;C21B15/00
主分类号
B22F9/22
代理机构
代理人
主权项
地址
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