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经营范围
发明名称
Alloy steel
摘要
申请公布号
US1990590(A)
申请公布日期
1935.02.12
申请号
US19310580211
申请日期
1931.12.10
申请人
ELECTRO METALLURGICAL COMPANY
发明人
FRANKS RUSSELL
分类号
C22C38/40
主分类号
C22C38/40
代理机构
代理人
主权项
地址
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