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发明名称
Ballast handling devices for use under railroad tracks
摘要
申请公布号
US3114330(A)
申请公布日期
1963.12.17
申请号
US19610091853
申请日期
1961.02.27
申请人
MANNIX CO. LTD.
发明人
CHRISTOFF JAMES W.
分类号
E01B27/02;E01B29/10;E01B29/14
主分类号
E01B27/02
代理机构
代理人
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地址
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