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发明名称
摘要
申请公布号
JPS549273(Y2)
申请公布日期
1979.04.28
申请号
JP19730067049U
申请日期
1973.06.08
申请人
发明人
分类号
B21D43/05;(IPC1-7):B21D43/05
主分类号
B21D43/05
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