Swinging mechanism for rock drills,申请号US19450571172-传众专利搜索

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发明名称	Swinging mechanism for rock drills
摘要
申请公布号	US2398311(A)	申请公布日期	1946.04.09
申请号	US19450571172	申请日期	1945.01.03
申请人	INGERSOLL-RAND COMPANY	发明人	HULSHIZER GEORGE W.
分类号	E21C25/02	主分类号	E21C25/02
代理机构		代理人
主权项
地址

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