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经营范围
发明名称
UNDERGROUND DRILLING DEVICE
摘要
申请公布号
JPH01163389(A)
申请公布日期
1989.06.27
申请号
JP19870042813
申请日期
1987.02.27
申请人
CENTRAL RES INST OF ELECTRIC POWER IND;SHINWA KIKO KK
发明人
KUSUNOKI KENICHIRO;KIMURA TADASHI
分类号
E21B7/18
主分类号
E21B7/18
代理机构
代理人
主权项
地址
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