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发明名称
摘要
申请公布号
JPS4914751(Y1)
申请公布日期
1974.04.12
申请号
JP19700068732U
申请日期
1970.07.08
申请人
发明人
分类号
B21D41/04;B21D19/00;(IPC1-7):B21D19/00
主分类号
B21D41/04
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