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发明名称
摘要
申请公布号
JPS4617809(Y1)
申请公布日期
1971.06.21
申请号
JP19680085291U
申请日期
1968.09.30
申请人
发明人
分类号
(IPC1-7):B21D11/22;B21D5/01
主分类号
(IPC1-7):B21D11/22
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