Rock bit with an extended center jet,申请号GB19970013381-传众专利搜索

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法人/股东/高管

发明名称	Rock bit with an extended center jet
摘要
申请公布号	GB9713381(D0)	申请公布日期	1997.08.27
申请号	GB19970013381	申请日期	1997.06.26
申请人	SMITH INTERNATIONAL INC	发明人
分类号	E21B10/16;E21B10/18	主分类号	E21B10/16
代理机构		代理人
主权项
地址

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