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发明名称
Machine for removing the ballast from beneath railway track sleepers
摘要
申请公布号
US2974429(A)
申请公布日期
1961.03.14
申请号
US19580721574
申请日期
1958.03.14
申请人
STEIN JACK C
发明人
STEIN JACK C.
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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