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发明名称
Mill mandrel bar
摘要
申请公布号
US2017389(A)
申请公布日期
1935.10.15
申请号
US19320615017
申请日期
1932.06.02
申请人
NATIONAL TUBE COMPANY
发明人
BARK WILLIAM;MAZURIE JAMES V.;OLSON OLOF F.
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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