THREE CONE ROCK BIT,申请号GB19760040585-传众专利搜索

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发明名称	THREE CONE ROCK BIT
摘要
申请公布号	GB1509509(A)	申请公布日期	1978.05.04
申请号	GB19760040585	申请日期	1976.09.30
申请人	VNII BUROV TEKH	发明人
分类号	E21B10/18;(IPC1-7):E21B9/10	主分类号	E21B10/18
代理机构		代理人
主权项
地址

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