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发明名称
STABILIZERS FOR BOREHOLE DRILLING APPARATUS
摘要
申请公布号
GB2096210(B)
申请公布日期
1984.11.07
申请号
GB19820009874
申请日期
1982.04.02
申请人
DRILCO DIVISION OF SMITH INTERNATIONAL INC
发明人
分类号
E21B17/10;(IPC1-7):E21B17/10
主分类号
E21B17/10
代理机构
代理人
主权项
地址
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