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发明名称
APPARATUS FOR FORMING HELICAL FINNED TUBING
摘要
申请公布号
CA481488(A)
申请公布日期
1952.03.04
申请号
CAD481488
申请日期
申请人
CALUMET AND HECLA CONSOLIDATED COPPER COMPANY
发明人
WALTER P. HILL
分类号
主分类号
代理机构
代理人
主权项
地址
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