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发明名称
STIFTSCHLAGBOHRER
摘要
申请公布号
DE2749613(A1)
申请公布日期
1979.05.10
申请号
DE19772749613
申请日期
1977.11.05
申请人
FRIED KRUPP GMBH
发明人
分类号
E21B10/40;E21B10/56;(IPC1-7):E21C13/08;E21B9/02;E21C13/06
主分类号
E21B10/40
代理机构
代理人
主权项
地址
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