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发明名称
EXCAVATION TOOL
摘要
申请公布号
JPH11303562(A)
申请公布日期
1999.11.02
申请号
JP19980115751
申请日期
1998.04.24
申请人
MITSUBISHI MATERIALS CORP;YAMAMOTO ROCK MACHINE KK
发明人
HAYASHI TAKESHI;TOFUN KAZUO;YOSHIDA KAZUYOSHI;KAWAKAMI HIROMI
分类号
E21B10/40;(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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