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发明名称
BIT FOR DRILLING GROOVED HOLE
摘要
申请公布号
JPS5712794(A)
申请公布日期
1982.01.22
申请号
JP19800088255
申请日期
1980.06.27
申请人
TOYO KOGYO CO
发明人
SHIBUKAWA TAKAO
分类号
E21B10/36;E21B10/26;E21B10/40;E21B19/24
主分类号
E21B10/36
代理机构
代理人
主权项
地址
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