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发明名称
摘要
申请公布号
JPS543155(Y2)
申请公布日期
1979.02.13
申请号
JP19710096805U
申请日期
1971.10.21
申请人
发明人
分类号
B21D43/00;B21J13/08;B21J13/10;(IPC1-7):B21J13/08
主分类号
B21D43/00
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代理人
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