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发明名称
Rock bit with hydraulics configuration
摘要
申请公布号
GB0916877(D0)
申请公布日期
2009.11.11
申请号
GB20090016877
申请日期
2009.09.25
申请人
SMITH INTERNATIONAL, INC.
发明人
分类号
主分类号
代理机构
代理人
主权项
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