Improvements in metal tubing and the manufacture thereof,申请号GB19390005631-传众专利搜索

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发明名称	Improvements in metal tubing and the manufacture thereof
摘要
申请公布号	GB525416(A)	申请公布日期	1940.08.28
申请号	GB19390005631	申请日期	1939.02.20
申请人	NATIONAL TUBE COMPANY	发明人
分类号	B21C3/16	主分类号	B21C3/16
代理机构		代理人
主权项
地址

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