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发明名称
DIRECTED BOREHOLE DRILLING APPARATUS
摘要
申请公布号
SU567804(A1)
申请公布日期
1977.08.05
申请号
SU19752092386
申请日期
1975.01.03
申请人
DO NII DONUGI
发明人
SAVICH NIKOLAJ S,SU;LEVKOVICH PAVEL E,SU;OPADKO LIDIYA L,SU
分类号
E21B7/04;(IPC1-7):E21B7/04
主分类号
E21B7/04
代理机构
代理人
主权项
地址
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