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发明名称
Turbodrill
摘要
申请公布号
US2984219(A)
申请公布日期
1961.05.16
申请号
US19580741119
申请日期
1958.06.10
申请人
MICHAEL MITCHELL
发明人
MITCHELL MICHAEL
分类号
E21B4/02;F01C1/46;F01C21/18
主分类号
E21B4/02
代理机构
代理人
主权项
地址
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