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经营范围
发明名称
Rock bit with an extended center jet
摘要
申请公布号
GB2314864(B)
申请公布日期
2001.01.31
申请号
GB19970013381
申请日期
1997.06.26
申请人
* SMITH INTERNATIONAL INC
发明人
DENNIS * CIANEROS;MICHAEL SMITH * OLIVER;ALAN W * LOCKSTEDT;PER I * NESE;GARY RAY * PORTWOOD;MICHAEL A * STRACKI
分类号
E21B10/16;E21B10/18;(IPC1-7):E21B10/18
主分类号
E21B10/16
代理机构
代理人
主权项
地址
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