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发明名称
EXCAVATING DRILL FOR CURVED EXCAVATION
摘要
申请公布号
JPH01260195(A)
申请公布日期
1989.10.17
申请号
JP19880087281
申请日期
1988.04.11
申请人
NKK CORP
发明人
KODAMA KIYOSHI
分类号
E21B7/08
主分类号
E21B7/08
代理机构
代理人
主权项
地址
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