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经营范围
发明名称
Well deviation control tool and method of manufacture thereof
摘要
申请公布号
GB2052609(A)
申请公布日期
1981.01.28
申请号
GB19800018651
申请日期
1980.06.06
申请人
NL INDUSTRIES INC
发明人
分类号
E21B7/10;E21B17/10;E21B17/16;(IPC1-7):E21B17/10
主分类号
E21B7/10
代理机构
代理人
主权项
地址
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