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发明名称
Perfectionnements aux tubes métalliques
摘要
申请公布号
FR716475(A)
申请公布日期
1931.12.21
申请号
FRD716475
申请日期
1931.05.04
申请人
THE AMERICAN BRASS COMPANY
发明人
分类号
C22F1/08;C23F15/00;C23G3/04
主分类号
C22F1/08
代理机构
代理人
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地址
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