Rotary axial impact type earth boring tool,申请号US19630263942-传众专利搜索

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发明名称	Rotary axial impact type earth boring tool
摘要
申请公布号	US3232361(A)	申请公布日期	1966.02.01
申请号	US19630263942	申请日期	1963.03.08
申请人	SMITH INDUSTRIES INTERNATIONAL, INC.	发明人	HASPERT JOHN C.
分类号	E21B6/00;E21B7/00;E21B31/08	主分类号	E21B6/00
代理机构		代理人
主权项
地址

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