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发明名称
Machine for drilling railroad ties
摘要
申请公布号
US1995168(A)
申请公布日期
1935.03.19
申请号
US19340705078
申请日期
1934.01.03
申请人
BRONANDER WILHELM B
发明人
BRONANDER WILHELM B.
分类号
E01B31/24
主分类号
E01B31/24
代理机构
代理人
主权项
地址
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