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发明名称
Earthwork and method of making same
摘要
申请公布号
US1900205(A)
申请公布日期
1933.03.07
申请号
US19300492681
申请日期
1930.11.01
申请人
SHERRILL CLARENCE O
发明人
SHERRILL CLARENCE O.
分类号
E02D29/02
主分类号
E02D29/02
代理机构
代理人
主权项
地址
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