Drill bit button sharpening,申请号GB19910002944-传众专利搜索

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发明名称	Drill bit button sharpening
摘要
申请公布号	GB2240940(A)	申请公布日期	1991.08.21
申请号	GB19910002944	申请日期	1991.02.12
申请人	* BOART INTERNATIONAL LIMITED	发明人	DAVID STANLEY * WILLIAMS
分类号	B24B3/33;E21B10/52	主分类号	B24B3/33
代理机构		代理人
主权项
地址

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