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经营范围
发明名称
Dual-seal drill bit with fluid cleaning capability
摘要
申请公布号
AU774583(B2)
申请公布日期
2004.07.01
申请号
AU20000061332
申请日期
2000.09.27
申请人
SMITH INTERNATIONAL, INC.
发明人
ROBERT H. SLAUGHTER JR.;ROGER DIDERICKSEN
分类号
B23B;E21B;E21B10/18;E21B10/22;(IPC1-7):E21B10/22
主分类号
B23B
代理机构
代理人
主权项
地址
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