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发明名称
摘要
申请公布号
JPS5893312(U)
申请公布日期
1983.06.24
申请号
JP19810189113U
申请日期
1981.12.17
申请人
发明人
分类号
B21C47/28;B21C47/30;(IPC1-7):B21C47/28
主分类号
B21C47/28
代理机构
代理人
主权项
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