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经营范围
发明名称
EXCAVATION TOOL
摘要
申请公布号
JPH0571287(A)
申请公布日期
1993.03.23
申请号
JP19910135156
申请日期
1991.06.06
申请人
MITSUBISHI MATERIALS CORP
发明人
HAYASHI TAKESHI;SABURI AKIHIRO;TSUJIMOTO KATSUAKI
分类号
E21B10/32;E21B10/36
主分类号
E21B10/32
代理机构
代理人
主权项
地址
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