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发明名称
摘要
申请公布号
JPH0447823(U)
申请公布日期
1992.04.23
申请号
JP19900088977U
申请日期
1990.08.24
申请人
发明人
分类号
B21D28/34;(IPC1-7):B21D28/34
主分类号
B21D28/34
代理机构
代理人
主权项
地址
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