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发明名称
Traction roll
摘要
申请公布号
US2696907(A)
申请公布日期
1954.12.14
申请号
US19510226467
申请日期
1951.05.15
申请人
发明人
分类号
B21B39/00
主分类号
B21B39/00
代理机构
代理人
主权项
地址
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