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发明名称
METHOD OF HOLE CONNECTION
摘要
申请公布号
RU2057919(C1)
申请公布日期
1996.04.10
申请号
SU19925021917
申请日期
1992.01.09
申请人
KREJNIN EFIM V
发明人
KREJNIN EFIM V
分类号
E21B43/28;(IPC1-7):E21B43/28
主分类号
E21B43/28
代理机构
代理人
主权项
地址
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