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发明名称
Railroad tie
摘要
申请公布号
US2128272(A)
申请公布日期
1938.08.30
申请号
US19370126467
申请日期
1937.02.18
申请人
STACKHOUSE ROY G
发明人
STACKHOUSE ROY G.
分类号
E01B3/18
主分类号
E01B3/18
代理机构
代理人
主权项
地址
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