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发明名称
DRILLING UNIT
摘要
申请公布号
SU802497(A1)
申请公布日期
1981.02.07
申请号
SU19792743628
申请日期
1979.03.30
申请人
MO GEOLOGORAZVEDOCHNYJ I IM.S.ORDZHONIKIDZE
发明人
BARASHKOV VYACHESLAV A,SU;BULGAKOV EVGENIJ S,SU;SIROTKIN NIKOLAJ V,SU;PLOKHIKH VITALIJ A,SU;PANIN NIKOLAJ M,SU
分类号
E21B7/02;(IPC1-7):E21B7/02
主分类号
E21B7/02
代理机构
代理人
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