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发明名称
Excavating tool
摘要
申请公布号
US2011938(A)
申请公布日期
1935.08.20
申请号
US19320623031
申请日期
1932.07.18
申请人
PAUL MILLER ANTHONY
发明人
MILLER ANTHONY PAUL
分类号
E21B7/00
主分类号
E21B7/00
代理机构
代理人
主权项
地址
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