Processo de perfuração e conjunto de brocas para executar o processo,申请号BR19950009996-传众专利搜索

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发明名称	Processo de perfuração e conjunto de brocas para executar o processo
摘要
申请公布号	BR9509996(A)	申请公布日期	1997.12.30
申请号	BR19950009996	申请日期	1995.12.13
申请人	VALTO ILOMAKI	发明人	ILIMAKI VALTO
分类号	E21B3/00;E21B;E21B7/20;E21B10/20;E21B17/046;(IPC1-7):E21B7/20	主分类号	E21B3/00
代理机构		代理人
主权项
地址

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