Devices for use in the manufacture of helically welded pipes or tubes,申请号GB19590015003-传众专利搜索

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发明名称	Devices for use in the manufacture of helically welded pipes or tubes
摘要
申请公布号	GB869390(A)	申请公布日期	1961.05.31
申请号	GB19590015003	申请日期	1959.05.01
申请人	BERNARD GRUTER	发明人
分类号	B21C37/12	主分类号	B21C37/12
代理机构		代理人
主权项
地址

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