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发明名称
Tube-drawing method
摘要
申请公布号
US2171595(A)
申请公布日期
1939.09.05
申请号
US19360095681
申请日期
1936.08.12
申请人
NATIONAL TUBE COMPANY
发明人
OFFUTT JOHN W.
分类号
B21C3/16
主分类号
B21C3/16
代理机构
代理人
主权项
地址
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