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发明名称
Drill bit
摘要
申请公布号
US2032328(A)
申请公布日期
1936.02.25
申请号
US19330703110
申请日期
1933.12.19
申请人
FRANKLIN G. REEDY
发明人
REEDY MELVIN E.
分类号
E21B10/40
主分类号
E21B10/40
代理机构
代理人
主权项
地址
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