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发明名称
Reenforced mine tie
摘要
申请公布号
US1753534(A)
申请公布日期
1930.04.08
申请号
US19290357490
申请日期
1929.04.23
申请人
ROSS JUSTUS J
发明人
ROSS JUSTUS J.
分类号
E01B23/04
主分类号
E01B23/04
代理机构
代理人
主权项
地址
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