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发明名称
Enlarging boreholes
摘要
申请公布号
GB2482703(B)
申请公布日期
2012.08.01
申请号
GB20100013485
申请日期
2010.08.11
申请人
JAN KRZYSIEK;ELZBIETA NAPIERALSKA-KRZYSIEK
发明人
JAN KRZYSIEK
分类号
E21B10/26
主分类号
E21B10/26
代理机构
代理人
主权项
地址
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