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发明名称
Tube-reducing mill
摘要
申请公布号
US1930698(A)
申请公布日期
1933.10.17
申请号
US19320585018
申请日期
1932.01.06
申请人
STIEFEL RALPH C
发明人
STIEFEL RALPH C.
分类号
B21B17/14
主分类号
B21B17/14
代理机构
代理人
主权项
地址
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