Ball seat sub,申请号GB20090017654-传众专利搜索

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发明名称	Ball seat sub
摘要
申请公布号	GB0917654(D0)	申请公布日期	2009.11.25
申请号	GB20090017654	申请日期	2009.10.08
申请人	SMITH INTERNATIONAL, INC.	发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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