A drill bit, a seal assembly and a method of sealing,申请号GB20050016356-传众专利搜索

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发明名称	A drill bit, a seal assembly and a method of sealing
摘要
申请公布号	GB0516356(D0)	申请公布日期	2005.09.14
申请号	GB20050016356	申请日期	2005.08.09
申请人	SMITH INTERNATIONAL, INC.	发明人
分类号	E21B10/22;E21B10/25	主分类号	E21B10/22
代理机构		代理人
主权项
地址

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