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发明名称
EXCAVATION TOOL
摘要
申请公布号
JPH0842276(A)
申请公布日期
1996.02.13
申请号
JP19940181675
申请日期
1994.08.02
申请人
MITSUBISHI MATERIALS CORP
发明人
HAYASHI TAKESHI;ISHIBASHI JUN
分类号
E21B4/14;E21B7/20;E21B10/38;(IPC1-7):E21B10/38
主分类号
E21B4/14
代理机构
代理人
主权项
地址
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