Device for orienting test cores,申请号US19340714175-传众专利搜索

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发明名称	Device for orienting test cores
摘要
申请公布号	US2003345(A)	申请公布日期	1935.06.04
申请号	US19340714175	申请日期	1934.03.05
申请人	DE MARIS ELMER L	发明人	MARIS ELMER L. DE
分类号	E21B25/16	主分类号	E21B25/16
代理机构		代理人
主权项
地址

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