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发明名称
EXCAVATION TOOL
摘要
申请公布号
JPH09184389(A)
申请公布日期
1997.07.15
申请号
JP19950344168
申请日期
1995.12.28
申请人
MITSUBISHI MATERIALS CORP
发明人
HIWASA YONEO;SABURI AKIHIRO;HAYASHI TAKESHI
分类号
E21B10/40;E21B10/62;(IPC1-7):E21B10/40
主分类号
E21B10/40
代理机构
代理人
主权项
地址
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