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发明名称
Omlöpsventil for en brönn
摘要
申请公布号
NO313713(B1)
申请公布日期
2002.11.18
申请号
NO19980002415
申请日期
1998.05.27
申请人
SMITH INTERNATIONAL INC
发明人
MCGARIAN, BRUCE;TULLOCH, RORY MCCRAE;BARR, LAWRENCE ROBERT
分类号
E21B21/00;E21B21/10;E21B23/00;E21B34/10;(IPC1-7):E21B34/06
主分类号
E21B21/00
代理机构
代理人
主权项
地址
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