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发明名称
BOHRMEISSEL
摘要
申请公布号
DE3516584(A1)
申请公布日期
1985.11.14
申请号
DE19853516584
申请日期
1985.05.08
申请人
SUMITOMO METAL MINING CO.LTD.
发明人
VERZICHT DES ERFINDERS AUF NENNUNG
分类号
E21B10/08;E21B10/20;E21B10/22;(IPC1-7):E21B10/22
主分类号
E21B10/08
代理机构
代理人
主权项
地址
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