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发明名称
摘要
申请公布号
JPS557309(Y2)
申请公布日期
1980.02.19
申请号
JP19740129651U
申请日期
1974.10.25
申请人
发明人
分类号
B26F1/00;B21D28/00;B21D39/02;B21D39/03;B21D39/04;B26F1/02;(IPC1-7):B21D39/04
主分类号
B26F1/00
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代理人
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