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发明名称
Railroad ballast dresser
摘要
申请公布号
US2281491(A)
申请公布日期
1942.04.28
申请号
US19400334248
申请日期
1940.05.09
申请人
HAIST WADE E;THOMAS PERNAL F
发明人
HAIST WADE E.;THOMAS PERNAL F.
分类号
E01B27/02
主分类号
E01B27/02
代理机构
代理人
主权项
地址
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