O-ring seal with lubricant additives for rock bit bearings,申请号GB19970021257-传众专利搜索

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发明名称	O-ring seal with lubricant additives for rock bit bearings
摘要
申请公布号	GB2318139(B)	申请公布日期	2000.12.13
申请号	GB19970021257	申请日期	1997.10.08
申请人	* SMITH INTERNATIONAL, INC.	发明人	ZHIGANG * FANG;STEVE * PETERSON;ROBERT * DENTON
分类号	E21B10/22;E21B10/25;F16J15/06;F16J15/32;(IPC1-7):E21B10/22	主分类号	E21B10/22
代理机构		代理人
主权项
地址

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