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发明名称
Improved means for securing railway rails to sleepers
摘要
申请公布号
GB340944(A)
申请公布日期
1931.01.05
申请号
GB19290029966
申请日期
1929.10.03
申请人
JOHN MORTKA
发明人
分类号
E01B9/32
主分类号
E01B9/32
代理机构
代理人
主权项
地址
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