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发明名称
TREPAN DE FORAGE
摘要
申请公布号
FR2564133(B1)
申请公布日期
1988.05.06
申请号
FR19850007009
申请日期
1985.05.09
申请人
SUMITOMO METAL MINING CY LTD
发明人
SHO TAKANO
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
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地址
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