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发明名称
摘要
申请公布号
JPS5231721(Y2)
申请公布日期
1977.07.19
申请号
JP19730062372U
申请日期
1973.05.29
申请人
发明人
分类号
B21C35/02;B21C23/04;(IPC1-7):B21C35/02
主分类号
B21C35/02
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