Improvement in the method of manufacturing twisted drills,申请号GB19480017416-传众专利搜索

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发明名称	Improvement in the method of manufacturing twisted drills
摘要
申请公布号	GB665836(A)	申请公布日期	1952.01.30
申请号	GB19480017416	申请日期	1948.06.29
申请人	JONAS OLOV BERGLUND	发明人
分类号	B21H3/00;B21K5/02;B23P15/32	主分类号	B21H3/00
代理机构		代理人
主权项
地址

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