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发明名称
ROTARY POWER SLIPS
摘要
申请公布号
GB2153880(B)
申请公布日期
1987.09.09
申请号
GB19850002665
申请日期
1985.02.01
申请人
* HUGHES TOOL COMPANY
发明人
WILLIAM EDWARD * CROWE
分类号
E21B19/10;(IPC1-7):E21B19/10
主分类号
E21B19/10
代理机构
代理人
主权项
地址
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