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发明名称
摘要
申请公布号
JPS54171649(U)
申请公布日期
1979.12.04
申请号
JP19780070750U
申请日期
1978.05.24
申请人
发明人
分类号
B21B31/08;(IPC1-7):B21B31/08
主分类号
B21B31/08
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代理人
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