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发明名称
DRILLING BIT
摘要
申请公布号
SU622961(A2)
申请公布日期
1978.09.05
申请号
SU19762334073
申请日期
1976.03.12
申请人
PANIN NIKOLAJ M,SU;KIRSANOV VALERIJ A,SU;BERESTEN LEONID K,SU;MARKOV NIKOLAJ N,SU;GONCHAROV ANATOLIJ D,SU
发明人
PANIN NIKOLAJ M,SU;KIRSANOV VALERIJ A,SU;BERESTEN LEONID K,SU;MARKOV NIKOLAJ N,SU;GONCHAROV ANATOLIJ D,SU
分类号
(IPC1-7):E21B9/16
主分类号
(IPC1-7):E21B9/16
代理机构
代理人
主权项
地址
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