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发明名称
KJERNEGRIPER FOR ANVENDELSE I ET KJERNEOPPTAKERVERKTOEY.
摘要
申请公布号
NO164932(B)
申请公布日期
1990.08.20
申请号
NO19850003417
申请日期
1985.08.30
申请人
CHRISTENSEN INC., NORTON
发明人
KNIGHTON, KELLY;DAVIS, J. STANLEY;RADFORD, STEVEN R.
分类号
E21B25/10;E21B25/14;(IPC1-7):E21B25/14
主分类号
E21B25/10
代理机构
代理人
主权项
地址
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