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发明名称
Pipe or tube rolling
摘要
申请公布号
US2237983(A)
申请公布日期
1941.04.08
申请号
US19390250807
申请日期
1939.01.13
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
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