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发明名称
CENTERING DEVICE FOR DRILL PIPES
摘要
申请公布号
SU1078024(A1)
申请公布日期
1984.03.07
申请号
SU19823501695
申请日期
1982.09.02
申请人
VARETSA ANATOLIJ,SU;SOLOVEV IVAN YA,SU;KUCHERYAVENKO YURIJ F,SU;PSHENICHNYJ PAVEL L,SU
发明人
VARETSA ANATOLIJ I,SU;SOLOVEV IVAN YA,SU;KUCHERYAVENKO YURIJ F,SU;PSHENICHNYJ PAVEL L,SU
分类号
E21B19/24;E21B17/10;E21B19/00;(IPC1-7):E21B19/00
主分类号
E21B19/24
代理机构
代理人
主权项
地址
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