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发明名称
Tube à ailettes
摘要
申请公布号
FR934809(A)
申请公布日期
1948.06.02
申请号
FRD934809
申请日期
1946.09.19
申请人
CALUMET AND HECLA CONSOLIDATED COPPER COMPANY
发明人
分类号
B21C37/20
主分类号
B21C37/20
代理机构
代理人
主权项
地址
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