Improvements in or relating to the manufacture of hollow billets such as required for tube making,申请号GB19310002200-传众专利搜索

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发明名称	Improvements in or relating to the manufacture of hollow billets such as required for tube making
摘要
申请公布号	GB371919(A)	申请公布日期	1932.04.22
申请号	GB19310002200	申请日期	1931.01.22
申请人	WELLMAN SEAVER ROLLING MILL COMPANY LIMITED;SYDNEY SMITH	发明人
分类号	B21C23/21	主分类号	B21C23/21
代理机构		代理人
主权项
地址

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