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发明名称
INSTALLATION FOR GUIDING BALL VALVE ONTO COUPLING OF EITHER DRILL STRING OR CASING
摘要
申请公布号
SU1314009(A1)
申请公布日期
1987.05.30
申请号
SU19853930751
申请日期
1985.07.19
申请人
SP PK BYURO AVTOM GLUBOKOGO RAZVEDOCHNOGO BURENIYA
发明人
MOLOCHNIKOV EFIM I,SU;CHAPLYGIN EVGENIJ A,SU
分类号
E21B33/03
主分类号
E21B33/03
代理机构
代理人
主权项
地址
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