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发明名称
Finned structure and method of making same
摘要
申请公布号
US2117445(A)
申请公布日期
1938.05.17
申请号
US19360072549
申请日期
1936.04.03
申请人
RECONSTRUCTION FINANCE CORPORATION
发明人
NIEMCHEK LOUIS
分类号
B21C37/26
主分类号
B21C37/26
代理机构
代理人
主权项
地址
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