Process for producing closed-end tubular bodies,申请号US19270225376-传众专利搜索

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发明名称	Process for producing closed-end tubular bodies
摘要
申请公布号	US1802843(A)	申请公布日期	1931.04.28
申请号	US19270225376	申请日期	1927.10.10
申请人	FRITZ SINGER	发明人	SINGER FRITZ
分类号	B21C23/20	主分类号	B21C23/20
代理机构		代理人
主权项
地址

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