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发明名称
Rail bond and method of making same
摘要
申请公布号
US1933444(A)
申请公布日期
1933.10.31
申请号
US19310523597
申请日期
1931.03.18
申请人
THE AMERICAN STEEL AND WIRE COMPANY
发明人
MOREIRA SALVADOR
分类号
B21F99/00;B60M5/00
主分类号
B21F99/00
代理机构
代理人
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