METHOD AND APPARATUS FOR CONTROLLING THE DIAMETER OF SPIRAL PIPE,申请号USD3499307-传众专利搜索

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发明名称	METHOD AND APPARATUS FOR CONTROLLING THE DIAMETER OF SPIRAL PIPE
摘要
申请公布号	US3499307(A)	申请公布日期	1970.03.10
申请号	USD3499307	申请日期	1968.03.14
申请人	ARMCO STEEL CORP.	发明人	ANDREW H. HUTTON
分类号	B21C37/12;(IPC1-7):B21F3/02	主分类号	B21C37/12
代理机构		代理人
主权项
地址

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