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经营范围
发明名称
MECHANICAL JARRING TOOL
摘要
申请公布号
EP0201668(B1)
申请公布日期
1988.06.08
申请号
EP19860101731
申请日期
1986.02.12
申请人
NORTON CHRISTENSEN, INC.
发明人
HEIDEMANN, GERHARD, DIPL.-ING.;WITTE, JOHANNES, DIPL.-ING.
分类号
E21B31/107;(IPC1-7):E21B31/107
主分类号
E21B31/107
代理机构
代理人
主权项
地址
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