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发明名称
Apparatus for removing ballast from beneath a railroad track
摘要
申请公布号
US2950549(A)
申请公布日期
1960.08.30
申请号
US19580720119
申请日期
1958.03.10
申请人
KERSHAW ROYCE G
发明人
KERSHAW ROYCE G.
分类号
E01B27/04
主分类号
E01B27/04
代理机构
代理人
主权项
地址
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