ELECTRIC DRIVE AND CONTROL SYSTEM FOR AUTOMATIC FEED OF DRILLING BIT AND FOR DRILLING STRING SALVING,申请号RO19900145807-传众专利搜索

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发明名称	ELECTRIC DRIVE AND CONTROL SYSTEM FOR AUTOMATIC FEED OF DRILLING BIT AND FOR DRILLING STRING SALVING
摘要
申请公布号	RO107010(B1)	申请公布日期	1993.08.30
申请号	RO19900145807	申请日期	1990.08.23
申请人	INTREPRINDEREA "1 MAI", PLOIESTI	发明人	CHIRCULESCU ANTON;RADULESCU NICULAE;DOBRESCU DUMITRU;PLESOIANU PETRE;COSTACHE ADRIAN
分类号	E21B44/00;(IPC1-7):E21B44/00	主分类号	E21B44/00
代理机构		代理人
主权项
地址

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