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发明名称
摘要
申请公布号
JPS643543(Y2)
申请公布日期
1989.01.31
申请号
JP19810047619U
申请日期
1981.04.02
申请人
发明人
分类号
B21D5/08;(IPC1-7):B21D5/08
主分类号
B21D5/08
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代理人
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