Process of rolling rings,申请号US19320595717-传众专利搜索

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发明名称	Process of rolling rings
摘要
申请公布号	US1971027(A)	申请公布日期	1934.08.21
申请号	US19320595717	申请日期	1932.02.29
申请人	EDGEWATER STEEL COMPANY	发明人	BELL FRANK B.
分类号	B21H1/06	主分类号	B21H1/06
代理机构		代理人
主权项
地址

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