Wear compensated roller cone drill bits,申请号GB20020002279-传众专利搜索

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发明名称	Wear compensated roller cone drill bits
摘要
申请公布号	GB0202279(D0)	申请公布日期	2002.03.20
申请号	GB20020002279	申请日期	2002.01.31
申请人	SMITH INTERNATIONAL, INC.	发明人
分类号	E21B10/16	主分类号	E21B10/16
代理机构		代理人
主权项
地址

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