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发明名称
摘要
申请公布号
JPS6454912(U)
申请公布日期
1989.04.05
申请号
JP19870146410U
申请日期
1987.09.28
申请人
发明人
分类号
B21C47/28;B21C47/32;(IPC1-7):B21C47/32
主分类号
B21C47/28
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代理人
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