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发明名称
摘要
申请公布号
JPS5430661(B2)
申请公布日期
1979.10.02
申请号
JP19750096955
申请日期
1975.08.08
申请人
发明人
分类号
B21C23/00;B21C23/21
主分类号
B21C23/00
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