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发明名称
DIREKTIONALES BOHRSYSTEM
摘要
申请公布号
AT554262(T)
申请公布日期
2012.05.15
申请号
AT20080872301T
申请日期
2008.12.16
申请人
PRAD RESEARCH AND DEVELOPMENT LIMITED
发明人
JOHNSON, ASHLEY
分类号
E21B7/06;E21B10/26
主分类号
E21B7/06
代理机构
代理人
主权项
地址
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