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发明名称
摘要
申请公布号	SU531589(A1)	申请公布日期	1976.10.15
申请号	SU19742090535	申请日期	1974.12.31
申请人		发明人
分类号	B21C37/12;(IPC1-7):B21C37/12	主分类号	B21C37/12
代理机构		代理人
主权项
地址

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