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发明名称
Expanding mandrel for feed reels
摘要
申请公布号
US2481000(A)
申请公布日期
1949.09.06
申请号
US19460664142
申请日期
1946.04.22
申请人
JONES & LAUGHLIN STEEL CORPORATION
发明人
BRUNNER RAY
分类号
B21C47/30
主分类号
B21C47/30
代理机构
代理人
主权项
地址
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