Straight hole drilling system,申请号AU19990053618-传众专利搜索

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发明名称	Straight hole drilling system
摘要
申请公布号	AU722409(B3)	申请公布日期	2000.08.03
申请号	AU19990053618	申请日期	1999.10.12
申请人	BOART LONGYEAR INC.	发明人	JAMES JING YAO
分类号	E21B17/042;F16B33/04;F16L15/06;(IPC1-7):E21B17/042	主分类号	E21B17/042
代理机构		代理人
主权项
地址

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