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发明名称
Method of manufacturing finned tubes with support engaging bearing portions
摘要
申请公布号
US2404575(A)
申请公布日期
1946.07.23
申请号
US19430491688
申请日期
1943.06.21
申请人
CALUMET AND HECLA CONSOLIDATED COPPER COMPANY
发明人
HILL WALTER P.
分类号
B21C37/20
主分类号
B21C37/20
代理机构
代理人
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