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发明名称
Power-driven posthole digger
摘要
申请公布号
US2557049(A)
申请公布日期
1951.06.12
申请号
US19460667174
申请日期
1946.05.03
申请人
TURNER OF INDIANA
发明人
HAINES GEORGE HERBERT
分类号
E21B7/02
主分类号
E21B7/02
代理机构
代理人
主权项
地址
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