Optimization of drill bit cutting structure,申请号GB20120008135-传众专利搜索

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发明名称	Optimization of drill bit cutting structure
摘要
申请公布号	GB201208135(D0)	申请公布日期	2012.06.20
申请号	GB20120008135	申请日期	2012.05.10
申请人	NATIONAL OILWELL DHT L.P.	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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