Improvements in or related to rotary drill bits,申请号GB19970003125-传众专利搜索

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发明名称	Improvements in or related to rotary drill bits
摘要
申请公布号	GB9703125(D0)	申请公布日期	1997.04.02
申请号	GB19970003125	申请日期	1997.02.14
申请人	CAMCO DRILLING GROUP LIMITED	发明人
分类号	E21B10/52	主分类号	E21B10/52
代理机构		代理人
主权项
地址

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