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发明名称
摘要
申请公布号
JPS56117910(U)
申请公布日期
1981.09.09
申请号
JP19800016068U
申请日期
1980.02.13
申请人
发明人
分类号
B21B37/18;(IPC1-7):B21B37/12
主分类号
B21B37/18
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代理人
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