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发明名称
摘要
申请公布号
JPS5680890(U)
申请公布日期
1981.06.30
申请号
JP19790155738U
申请日期
1979.11.12
申请人
发明人
分类号
B21D24/00;B21D22/22;B30B1/06;B30B1/26;B30B15/04;B30B15/06;(IPC1-7):B30B1/06
主分类号
B21D24/00
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代理人
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