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发明名称
摘要
申请公布号
JPS5140298(Y2)
申请公布日期
1976.10.01
申请号
JP19710052531U
申请日期
1971.06.18
申请人
发明人
分类号
B21D3/14;B21D1/08;B21D3/00;B21D3/10;(IPC1-7):B21D1/08
主分类号
B21D3/14
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