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发明名称
摘要
申请公布号	JPH0763753(B2)	申请公布日期	1995.07.12
申请号	JP19900231905	申请日期	1990.08.31
申请人		发明人
分类号	B21C23/00;B21C23/08;(IPC1-7):B21C23/00	主分类号	B21C23/00
代理机构		代理人
主权项
地址

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