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发明名称
Torque control in rotary well drilling
摘要
申请公布号
US2314560(A)
申请公布日期
1943.03.23
申请号
US19410391876
申请日期
1941.05.05
申请人
CONSOCO INCORPORATED
发明人
SCHARPENBERG CHARLES C.
分类号
E21B19/08
主分类号
E21B19/08
代理机构
代理人
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地址
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