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发明名称
EXPANDABLE ROLLER BIT
摘要
申请公布号
HU0800047(A2)
申请公布日期
2009.10.28
申请号
HU20080000047
申请日期
2008.01.25
申请人
PALFFY ENDRE
发明人
PALFFY ENDRE
分类号
E21B10/32;E21B10/26;E21B10/34
主分类号
E21B10/32
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代理人
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