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发明名称
Электробур с применением местной забойной циркуляции промывочной жидкости
摘要
申请公布号
SU90309(A1)
申请公布日期
1950.11.30
申请号
SU19500413548
申请日期
1950.03.06
申请人
TARAN V.D.;TER-SIMONYANTS A.G.
发明人
TARAN V.D.;TER-SIMONYANTS A.G.
分类号
E21B4/04;E21B21/00
主分类号
E21B4/04
代理机构
代理人
主权项
地址
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