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发明名称
ROLLER DRILL FOR BORING OIL WELLS
摘要
申请公布号
HU176834(B)
申请公布日期
1981.05.28
申请号
HU1978OA00590
申请日期
1978.03.17
申请人
ORSZAGOS KOEOLAJ- ES GAZIPARI TROESZT,HU
发明人
JANOSSY,ERVIN,HU;FLORIAN,ZOLTAN,HU;TOTH,GABOR,HU
分类号
(IPC1-7):E21B9/00
主分类号
(IPC1-7):E21B9/00
代理机构
代理人
主权项
地址
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