Method of reducing metal tubing,申请号US19390266237-传众专利搜索

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发明名称	Method of reducing metal tubing
摘要
申请公布号	US2270398(A)	申请公布日期	1942.01.20
申请号	US19390266237	申请日期	1939.04.06
申请人	SVEN WESTIN	发明人	WESTIN SVEN
分类号	B21C3/04	主分类号	B21C3/04
代理机构		代理人
主权项
地址

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