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发明名称
摘要
申请公布号
JPS5250211(Y2)
申请公布日期
1977.11.15
申请号
JP19740129911U
申请日期
1974.10.23
申请人
发明人
分类号
B21J9/06;B21G3/20;B21G3/28;(IPC1-7):B21G3/20
主分类号
B21J9/06
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代理人
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