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发明名称
BOHRVORRICHTUNG FUER DAS ERDBOHREN
摘要
申请公布号
DE2920049(A1)
申请公布日期
1981.02.12
申请号
DE19792920049
申请日期
1979.05.18
申请人
SALZGITTER MASCHINEN UND ANLAGEN AG
发明人
MAGER,WERNER
分类号
E21B4/02;E21B4/18;(IPC1-7):E21B3/00
主分类号
E21B4/02
代理机构
代理人
主权项
地址
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