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发明名称
FLUID-TIGHT BEARING UNIT OF ROTARY DRILLING BIT
摘要
申请公布号
SU817193(A1)
申请公布日期
1981.03.30
申请号
SU19782584828
申请日期
1978.11.10
申请人
MO I NEFTEKHIMICHESKOJ GAZOVOJ PROMY IM.I.M.GUBKINA
发明人
SIMONOV VLADIMIR V,SU;PALASHCHENKO YURIJ A,SU;AKSENOV VIKTOR E,SU
分类号
E21B10/25;(IPC1-7):E21B9/08;E21B9/35
主分类号
E21B10/25
代理机构
代理人
主权项
地址
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