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发明名称
Rail fastening
摘要
申请公布号
US2196521(A)
申请公布日期
1940.04.09
申请号
US19380221872
申请日期
1938.07.29
申请人
CAIRNCROSS ROBERT L
发明人
CAIRNCROSS ROBERT L.
分类号
E01B9/08
主分类号
E01B9/08
代理机构
代理人
主权项
地址
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