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发明名称
DRILL STRING
摘要
申请公布号
SU901469(A1)
申请公布日期
1982.01.30
申请号
SU19802920068
申请日期
1980.04.28
申请人
BRUSS NI GEOLOGORAZVEDOCHNYJ IU GEOLOGII PRI SOVETE MINISTROV BSSR
发明人
SAFONOV VLADIMIR S,SU;ESHIMOV GEORGIJ K,SU;PLOSHCHADNYJ VIKTOR YA,SU;POROZHSKIJ KONSTANTIN P,SU
分类号
E21B25/00;(IPC1-7):E21B25/00
主分类号
E21B25/00
代理机构
代理人
主权项
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