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经营范围
发明名称
INTERNAL WRENCH FOR A TOP HEAD DRIVE ASSEMBLY
摘要
申请公布号
EP0285386(A3)
申请公布日期
1989.03.29
申请号
EP19880302818
申请日期
1988.03.30
申请人
W-N APACHE CORPORATION
发明人
HANEY, KEITH MALLORY
分类号
E21B3/02;E21B19/16;(IPC1-7):E21B19/16
主分类号
E21B3/02
代理机构
代理人
主权项
地址
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