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发明名称
Method and apparatus for elongating metal articles
摘要
申请公布号
US1982544(A)
申请公布日期
1934.11.27
申请号
US19320637611
申请日期
1932.10.13
申请人
TUBUS A. G.
发明人
SINGER FRITZ
分类号
B21C1/24
主分类号
B21C1/24
代理机构
代理人
主权项
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