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发明名称
摘要
申请公布号	CS176958(B1)	申请公布日期	1977.07.29
申请号	CS19750008554	申请日期	1975.12.16
申请人		发明人
分类号	B21B39/18;(IPC1-7):B21B39/18	主分类号	B21B39/18
代理机构		代理人
主权项
地址

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