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发明名称
METHOD OF DRILLING BORE-HOLES AND DRILLING RIG THEREFOR
摘要
申请公布号
PL320676(A1)
申请公布日期
1997.10.27
申请号
PL19950320676
申请日期
1995.12.13
申请人
ILOMAKI VALTO
发明人
ILOMAKI VALTO
分类号
E21B3/00;E21B;E21B7/20;E21B10/20;E21B17/046;(IPC1-7):E21B7/20
主分类号
E21B3/00
代理机构
代理人
主权项
地址
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