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发明名称
Frozen rail joint
摘要
申请公布号
US2170018(A)
申请公布日期
1939.08.22
申请号
US19370165756
申请日期
1937.09.25
申请人
POOR & COMPANY
发明人
GADD WILLIAM EYRE
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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