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发明名称
DREHBOHRWERKZEUG
摘要
申请公布号
DE2440499(B2)
申请公布日期
1976.08.05
申请号
DE19742440499
申请日期
1974.08.23
申请人
发明人
分类号
E21B10/22;F16C35/06;(IPC1-7):E21B9/08
主分类号
E21B10/22
代理机构
代理人
主权项
地址
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