SPHERICAL ROTARY BIT.,申请号AU19850039656-传众专利搜索

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发明名称	SPHERICAL ROTARY BIT.
摘要
申请公布号	AU580757(B2)	申请公布日期	1989.02.02
申请号	AU19850039656	申请日期	1985.03.08
申请人	INCO LIMITED	发明人	JOHN RICHARD ENGLAND;DONALD A. DESJARDINS
分类号	E21B7/08;E21B10/08;E21B10/16;E21B10/28;E21B10/40;E21B10/52;(IPC1-7):E21B10/08;E21B10/22	主分类号	E21B7/08
代理机构		代理人
主权项
地址

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