Improvements in the manufacture of seamless tubes on a pilger step rolling mill,申请号GB19390015585-传众专利搜索

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发明名称	Improvements in the manufacture of seamless tubes on a pilger step rolling mill
摘要
申请公布号	GB529259(A)	申请公布日期	1940.11.18
申请号	GB19390015585	申请日期	1939.05.25
申请人	SOCIETE ANONYME DES TUBES DE VALENCIENNES ET DENAIN	发明人
分类号	B21B21/00	主分类号	B21B21/00
代理机构		代理人
主权项
地址

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