Percussion attachments for rotary drills,申请号US19580755316-传众专利搜索

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发明名称	Percussion attachments for rotary drills
摘要
申请公布号	US2979962(A)	申请公布日期	1961.04.18
申请号	US19580755316	申请日期	1958.08.15
申请人	NINDEL JOHN E	发明人	NINDEL JOHN E.
分类号	B25D11/10	主分类号	B25D11/10
代理机构		代理人
主权项
地址

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