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发明名称
Drilling mechanism
摘要
申请公布号
US1760316(A)
申请公布日期
1930.05.27
申请号
US19240699122
申请日期
1924.03.13
申请人
SULLIVAN MACHINERY COMPANY
发明人
OSGOOD CHARLES F.
分类号
E21B19/086;E21B44/06
主分类号
E21B19/086
代理机构
代理人
主权项
地址
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