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发明名称
Pipe or tube rolling
摘要
申请公布号
US2167418(A)
申请公布日期
1939.07.25
申请号
US19370121660
申请日期
1937.01.21
申请人
NATIONAL TUBE COMPANY
发明人
FINDLATER STEVENSON
分类号
B21B25/04
主分类号
B21B25/04
代理机构
代理人
主权项
地址
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