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发明名称
Frozen rail joints
摘要
申请公布号
US2785862(A)
申请公布日期
1957.03.19
申请号
US19520273639
申请日期
1952.02.27
申请人
POOR & COMPANY
发明人
LANSING HORACE L.
分类号
E01B11/04
主分类号
E01B11/04
代理机构
代理人
主权项
地址
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