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经营范围
发明名称
Hole-cleaning apparatus
摘要
申请公布号
US1760582(A)
申请公布日期
1930.05.27
申请号
US19230660837
申请日期
1923.09.04
申请人
THE GARDNER-DENVER COMPANY
发明人
CLARK OMAR E.
分类号
E21B21/01
主分类号
E21B21/01
代理机构
代理人
主权项
地址
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