HYDRAULIC CIRCUITRY FOR RAISE DRILL APPARATUS,申请号ZM19800000047-传众专利搜索

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发明名称	HYDRAULIC CIRCUITRY FOR RAISE DRILL APPARATUS
摘要
申请公布号	ZM4780(A1)	申请公布日期	1981.10.21
申请号	ZM19800000047	申请日期	1980.05.08
申请人	DRESSER IND	发明人
分类号	E21B3/02;E21B19/086;(IPC1-7):B23B39/10	主分类号	E21B3/02
代理机构		代理人
主权项
地址

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