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经营范围
发明名称
Ground boring apparatus
摘要
申请公布号
GB9600892(D0)
申请公布日期
1996.03.20
申请号
GB19960000892
申请日期
1996.01.17
申请人
HOLLOWAY, DAVID E
发明人
分类号
E21B7/06;E21B10/60;E21B47/01
主分类号
E21B7/06
代理机构
代理人
主权项
地址
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