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发明名称
DRILLING BIT
摘要
申请公布号
JPH0762966(A)
申请公布日期
1995.03.07
申请号
JP19930234020
申请日期
1993.08.26
申请人
ICHIKAWA SEIKI:KK
发明人
ICHIKAWA SHINICHI
分类号
E21B10/02;B28D1/14;(IPC1-7):E21B10/02
主分类号
E21B10/02
代理机构
代理人
主权项
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