Колонковое шарошечное долото,申请号SU19510445861-传众专利搜索

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发明名称	Колонковое шарошечное долото
摘要
申请公布号	SU95897(A1)	申请公布日期	1952.11.30
申请号	SU19510445861	申请日期	1951.09.16
申请人	OBLEUKHOV T.V.	发明人	OBLEUKHOV T.V.
分类号	E21B10/06	主分类号	E21B10/06
代理机构		代理人
主权项
地址

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