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发明名称
摘要
申请公布号
JPS5625892(B2)
申请公布日期
1981.06.15
申请号
JP19730061821
申请日期
1973.06.04
申请人
发明人
分类号
B21C49/00;B21B41/00;B65H20/24;B65H23/188
主分类号
B21C49/00
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