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发明名称
摘要
申请公布号
JPS546748(Y2)
申请公布日期
1979.03.30
申请号
JP19740072725U
申请日期
1974.06.22
申请人
发明人
分类号
B21D1/00;B21B41/00;B21C49/00;B21D43/02;B23Q7/00;B30B15/30;B65H23/04;(IPC1-7):B21C49/00
主分类号
B21D1/00
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代理人
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地址
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