Horizontal boring machine,申请号US19560611970-传众专利搜索

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发明名称	Horizontal boring machine
摘要
申请公布号	US2835472(A)	申请公布日期	1958.05.20
申请号	US19560611970	申请日期	1956.09.25
申请人	OSBORN JOHN D	发明人	OSBORN JOHN D.
分类号	E21B7/04	主分类号	E21B7/04
代理机构		代理人
主权项
地址

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