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发明名称
VERBESSERTER SCHUH FÜR BOHRLOCHROHRAUSKLEIDUNG
摘要
申请公布号
DE602008003766(D1)
申请公布日期
2011.01.13
申请号
DE200860003766T
申请日期
2008.01.21
申请人
CALEDUS LTD.
发明人
HOWLETT, PAUL;WARDLEY, MICHAEL
分类号
E21B7/20;E21B21/10;E21B33/14
主分类号
E21B7/20
代理机构
代理人
主权项
地址
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