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发明名称
Earth auger
摘要
申请公布号
US2504978(A)
申请公布日期
1950.04.25
申请号
US19460646871
申请日期
1946.02.11
申请人
HENNING FREDERICK E
发明人
HENNING FREDERICK E.
分类号
E21B10/44
主分类号
E21B10/44
代理机构
代理人
主权项
地址
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