DRILLING BIT,申请号RO19890141389-传众专利搜索

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发明名称	DRILLING BIT
摘要
申请公布号	RO108265(B1)	申请公布日期	1994.03.31
申请号	RO19890141389	申请日期	1989.09.28
申请人	INTREPRINDEREA " 1 MAI ", PLOIESTI	发明人	ENE DUMITRU;VARGA TANASE;NAUM MIHAIL;VORONEANU ION
分类号	E21B10/22;(IPC1-7):E21B10/22	主分类号	E21B10/22
代理机构		代理人
主权项
地址

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