Verfahren zur Herstellung von Hohlbohrstahl,申请号DE1934ST52152D-传众专利搜索

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发明名称	Verfahren zur Herstellung von Hohlbohrstahl
摘要
申请公布号	DE668086(C)	申请公布日期	1938.11.25
申请号	DE1934ST52152D	申请日期	1934.05.01
申请人		发明人	Dr.-Ing. Wilhelm Stich
分类号	B21B23/00	主分类号	B21B23/00
代理机构		代理人
主权项
地址

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