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经营范围
发明名称
Rotary underreamer
摘要
申请公布号
US2124663(A)
申请公布日期
1938.07.26
申请号
US19370156917
申请日期
1937.08.02
申请人
FRANK WINTEMUTE
发明人
WINTEMUTE FRANK
分类号
E21B10/32
主分类号
E21B10/32
代理机构
代理人
主权项
地址
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