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经营范围
发明名称
Drill bit
摘要
申请公布号
GB2347701(B)
申请公布日期
2003.06.11
申请号
GB20000002397
申请日期
2000.02.02
申请人
* SMITH INTERNATIONAL INC
发明人
CHRIS E * CAWTHORNE;QUAN VAN * NGUYEN;MICHAEL A * SIRACKI;STEVEN WILFORD * PETERSON
分类号
E21B10/22;E21B10/25;(IPC1-7):E21B10/22
主分类号
E21B10/22
代理机构
代理人
主权项
地址
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