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发明名称
DIGGING TOOL, DIGGING BIT, AND DEVICE
摘要
申请公布号
EP2189617(A4)
申请公布日期
2013.02.27
申请号
EP20080751901
申请日期
2008.04.22
申请人
MITSUBISHI MATERIALS CORPORATION
发明人
HIWASA, YONEO;HISADA, MASAYA;NAKAMURA, KAZUYOSHI
分类号
E21B10/38;E21B17/04
主分类号
E21B10/38
代理机构
代理人
主权项
地址
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