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发明名称
BOHRWERKZEUG.
摘要
申请公布号
AT61446(T)
申请公布日期
1991.03.15
申请号
AT19870850054T
申请日期
1987.02.16
申请人
SANTRADE LTD.
发明人
KJELL-OVE, JANSSON
分类号
E21B7/20;E21B10/32;E21B10/40;E21B10/66;(IPC1-7):E21B10/32
主分类号
E21B7/20
代理机构
代理人
主权项
地址
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