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发明名称
Tie-tamping system and method of operating the same
摘要
申请公布号
US1819009(A)
申请公布日期
1931.08.18
申请号
US19290411235
申请日期
1929.12.03
申请人
WEYANDT CARL S
发明人
WEYANDT CARL S.
分类号
E01B27/16
主分类号
E01B27/16
代理机构
代理人
主权项
地址
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