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发明名称
Bohrmeissel
摘要
申请公布号
DE69421066(T2)
申请公布日期
2000.04.13
申请号
DE19946021066T
申请日期
1994.04.18
申请人
AMIC INDUSTRIES LTD., JOHANNESBURG
发明人
KLOPPERS, STEPHANUS FREDERICK
分类号
E21B17/04;(IPC1-7):E21B17/04
主分类号
E21B17/04
代理机构
代理人
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地址
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