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发明名称
Cross tie for railways
摘要
申请公布号
US2120887(A)
申请公布日期
1938.06.14
申请号
US19370169291
申请日期
1937.10.15
申请人
DAVIS WILLIAM E
发明人
DAVIS WILLIAM E.
分类号
E01B3/16
主分类号
E01B3/16
代理机构
代理人
主权项
地址
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