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发明名称
摘要
申请公布号
JPS5028464(A)
申请公布日期
1975.03.24
申请号
JP19730081222
申请日期
1973.07.18
申请人
发明人
分类号
B21C47/00;B65H23/00
主分类号
B21C47/00
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