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发明名称
摘要
申请公布号
JPS4728842(U)
申请公布日期
1972.12.01
申请号
JP19710033727U
申请日期
1971.04.30
申请人
发明人
分类号
B21B39/16;(IPC1-7):B21B39/16
主分类号
B21B39/16
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