Способ изменения твердости абразивных кругов,申请号SU19470010769-传众专利搜索

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发明名称	Способ изменения твердости абразивных кругов
摘要
申请公布号	SU70882(A2)	申请公布日期	1947.11.30
申请号	SU19470010769	申请日期	1947.01.28
申请人	DYMSHITS E.S.	发明人	DYMSHITS E.S.
分类号	B24D3/34	主分类号	B24D3/34
代理机构		代理人
主权项
地址

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