Superhard material enhanced inserts for earth-boring bits,申请号GB19990027885-传众专利搜索

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发明名称	Superhard material enhanced inserts for earth-boring bits
摘要
申请公布号	GB9927885(D0)	申请公布日期	2000.01.26
申请号	GB19990027885	申请日期	1999.11.25
申请人	SMITH INTERNATIONAL INC	发明人
分类号	E21B10/16;E21B10/52;E21B10/56;E21B10/567	主分类号	E21B10/16
代理机构		代理人
主权项
地址

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