Improvements in or relating to grinding or sharpening wheels,申请号GB19390020663-传众专利搜索

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发明名称	Improvements in or relating to grinding or sharpening wheels
摘要
申请公布号	GB530670(A)	申请公布日期	1940.12.17
申请号	GB19390020663	申请日期	1939.07.15
申请人	JOHN ROBERTSON BROWN	发明人
分类号	B24D7/14	主分类号	B24D7/14
代理机构		代理人
主权项
地址

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