Feeding device for rock drills,申请号US19440519601-传众专利搜索

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发明名称	Feeding device for rock drills
摘要
申请公布号	US2379811(A)	申请公布日期	1945.07.03
申请号	US19440519601	申请日期	1944.01.25
申请人	INGERSOLL-RAND COMPANY	发明人	LINCOLN PAUL A.
分类号	E21B19/081	主分类号	E21B19/081
代理机构		代理人
主权项
地址

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