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发明名称
DRILL PIPE JOINT
摘要
申请公布号
SU1654519(A1)
申请公布日期
1991.06.07
申请号
SU19884431567
申请日期
1988.04.11
申请人
DN OTDEL I MINERAL RESURS
发明人
DANILCHENKO IGOR E,SU;VASYUK BORIS N,SU;KOVALEVSKAYA LYUDMILA I,SU;LACHINYAN LEONID A,SU
分类号
E21B17/042;E21B17/043
主分类号
E21B17/042
代理机构
代理人
主权项
地址
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