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发明名称
摘要
申请公布号
JPS55129501(U)
申请公布日期
1980.09.12
申请号
JP19790030873U
申请日期
1979.03.09
申请人
发明人
分类号
B21B31/02;(IPC1-7):B21B31/02
主分类号
B21B31/02
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代理人
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