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发明名称
TELESCOPICAL DRILLING BIT OF OIL WELLS
摘要
申请公布号
RO106783(B1)
申请公布日期
1993.06.30
申请号
RO19890138725
申请日期
1989.03.17
申请人
INSTITUTUL DE CERCETARI SI PROIECTARI PENTRU PETROL SI GAZE, CAMPINA, JUDETUL PRAHOVA
发明人
STANCIU ION
分类号
E21B10/14;(IPC1-7):E21B10/14
主分类号
E21B10/14
代理机构
代理人
主权项
地址
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