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发明名称
摘要
申请公布号
JPS4974582(U)
申请公布日期
1974.06.27
申请号
JP19720118374U
申请日期
1972.10.13
申请人
发明人
分类号
B21D43/18;B21D43/02;B23Q7/00;(IPC1-7):B21D43/02
主分类号
B21D43/18
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代理人
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