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发明名称
摘要
申请公布号
JPS57194722(U)
申请公布日期
1982.12.10
申请号
JP19810081873U
申请日期
1981.06.03
申请人
发明人
分类号
B21D3/04;(IPC1-7):B21D3/04
主分类号
B21D3/04
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代理人
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