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发明名称
Crosstie and cleat therefor
摘要
申请公布号
US2482599(A)
申请公布日期
1949.09.20
申请号
US19470782531
申请日期
1947.10.28
申请人
OF MICHAEL ALBERT ROSENBERG
发明人
MICHAEL ALBERT ROSENBERG OF
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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