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发明名称
Railroad spike
摘要
申请公布号
US2474281(A)
申请公布日期
1949.06.28
申请号
US19470770894
申请日期
1947.08.27
申请人
GENNARO GIUDICE
发明人
RUIZ RAMON A.
分类号
E01B9/12
主分类号
E01B9/12
代理机构
代理人
主权项
地址
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