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发明名称
Ballast cleaning machine
摘要
申请公布号
US1951451(A)
申请公布日期
1934.03.20
申请号
US19280283669
申请日期
1928.06.07
申请人
FRANK SPENO
发明人
SPENO FRANK
分类号
E01B27/10
主分类号
E01B27/10
代理机构
代理人
主权项
地址
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