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发明名称
摘要
申请公布号
JPS5641335(B2)
申请公布日期
1981.09.28
申请号
JP19780063792
申请日期
1978.05.30
申请人
发明人
分类号
B21D26/047;B21D26/049;B21D51/18
主分类号
B21D26/047
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