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发明名称
EINRICHTUNG UND VERFAHREN ZUM HERSTELLEN EINES BOHRLOCHS IM ERDBODEN.
摘要
申请公布号
AT121497(T)
申请公布日期
1995.05.15
申请号
AT19900201024T
申请日期
1990.04.24
申请人
SMET, NIK
发明人
SMET, NIK
分类号
E21B4/20;E21B7/24;E21B7/26;E21B19/22;(IPC1-7):E21B19/22
主分类号
E21B4/20
代理机构
代理人
主权项
地址
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