Mechanized oil field drill rig,申请号US19550481643-传众专利搜索

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发明名称	Mechanized oil field drill rig
摘要
申请公布号	US3002560(A)	申请公布日期	1961.10.03
申请号	US19550481643	申请日期	1955.01.13
申请人	JOY MANUFACTURING COMPANY	发明人	PAGET WIN W.
分类号	E21B3/00;E21B19/20	主分类号	E21B3/00
代理机构		代理人
主权项
地址

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