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发明名称
Nedhulls omlöpsventil
摘要
申请公布号
NO20014404(A)
申请公布日期
2001.11.05
申请号
NO20010004404
申请日期
2001.09.11
申请人
SMITH INTERNATIONAL INC
发明人
MCGARIAN, BRUCE;GILLIEN, IAN
分类号
E21B21/10;(IPC1-7):E21B21/10
主分类号
E21B21/10
代理机构
代理人
主权项
地址
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