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发明名称
Method and apparatus for forming tubes
摘要
申请公布号
US2012796(A)
申请公布日期
1935.08.27
申请号
US19310560642
申请日期
1931.09.01
申请人
REPUBLIE STEEL CORPORATION
发明人
MORGAN ARTHUR
分类号
B21D5/12
主分类号
B21D5/12
代理机构
代理人
主权项
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