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发明名称
FLEXIBLE BORE ROD FEEDING APPARATUS FOR QUICKENING ROTARY DEEP DRILLINGS
摘要
申请公布号
HU197407(B)
申请公布日期
1989.03.28
申请号
HU19850002120
申请日期
1985.05.31
申请人
FENYVESI,JANOS,HU
发明人
FENYVESI,JANOS,HU
分类号
E21B19/18;(IPC1-7):E21B19/18
主分类号
E21B19/18
代理机构
代理人
主权项
地址
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