DRILL STRING,申请号JP19860179824-传众专利搜索

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发明名称	DRILL STRING
摘要
申请公布号	JPS6229695(A)	申请公布日期	1987.02.07
申请号	JP19860179824	申请日期	1986.07.30
申请人	ALSTHOM ATLANTIQUE SA	发明人	JIYORUJIYU OBUREHITO
分类号	E21B7/06;E21B7/08	主分类号	E21B7/06
代理机构		代理人
主权项
地址

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