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发明名称
Drehbohrvorrichtung zum Erweitern von vertikalen Bohrungen.
摘要
申请公布号
CH682835(A5)
申请公布日期
1993.11.30
申请号
CH19900001985
申请日期
1990.06.13
申请人
DIPL.-ING. THEO FROMME
发明人
FROMME, THEO, DIPL.-ING.
分类号
E21B7/20;E21B10/32;(IPC1-7):E21B3/00;E02D27/12;E02F5/20
主分类号
E21B7/20
代理机构
代理人
主权项
地址
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