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发明名称
Auger type ballast excavator
摘要
申请公布号
US2697887(A)
申请公布日期
1954.12.28
申请号
US19500199643
申请日期
1950.12.07
申请人
ROYCE KERSHAW
发明人
KERSHAW ROYCE
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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