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发明名称
DEVICE FOR HOLDING DRILLING COLUMN
摘要
申请公布号
SU1684470(A1)
申请公布日期
1991.10.15
申请号
SU19884626997
申请日期
1988.12.26
申请人
NI PK I PO DOBYCHE POLEZNYKH ISKOPAEMYKH OTKRYTYM SPOSOBOM
发明人
BRYUKHOV BORIS F,SU;TELESHOV ADOLF S,SU;NURGALIN SHAJDULLA A,SU
分类号
E21B19/10
主分类号
E21B19/10
代理机构
代理人
主权项
地址
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