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经营范围
发明名称
BORESTRENGSTABILISATOR.
摘要
申请公布号
NO157347(B)
申请公布日期
1987.11.23
申请号
NO19810003952
申请日期
1981.11.20
申请人
MOBIL OIL CORP.
发明人
DELLINGER, THOMAS BAYNE;KELLY, JOHN JR.
分类号
E21B4/00;E21B7/04;E21B10/04;E21B17/10;E21B21/00;E21B21/10;E21B41/00;(IPC1-7):E21B7/00
主分类号
E21B4/00
代理机构
代理人
主权项
地址
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