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发明名称
摘要
申请公布号
JPS529613(B1)
申请公布日期
1977.03.17
申请号
JP19710047771
申请日期
1971.06.29
申请人
发明人
分类号
B21C1/00;(IPC1-7):B21C1/00
主分类号
B21C1/00
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代理人
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