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经营范围
发明名称
Cutter and bearing assembly
摘要
申请公布号
US2190365(A)
申请公布日期
1940.02.13
申请号
US19380186641
申请日期
1938.01.24
申请人
GLOBE OIL TOOLS COMPANY
发明人
MAXWELL ROBERT W.
分类号
E21B10/10
主分类号
E21B10/10
代理机构
代理人
主权项
地址
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