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发明名称
Spring rail grip
摘要
申请公布号
US2152853(A)
申请公布日期
1939.04.04
申请号
US19380207223
申请日期
1938.05.11
申请人
THE RAILS COMPANY
发明人
PACKER EBEN R.
分类号
E01B9/48
主分类号
E01B9/48
代理机构
代理人
主权项
地址
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