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发明名称
Method and apparatus for the production of seamless tubing
摘要
申请公布号
US2074271(A)
申请公布日期
1937.03.16
申请号
US19320648714
申请日期
1932.12.23
申请人
HERBERT PETERS
发明人
PETERS HERBERT
分类号
B21C45/00
主分类号
B21C45/00
代理机构
代理人
主权项
地址
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