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发明名称
摘要
申请公布号
JPS57200304(U)
申请公布日期
1982.12.20
申请号
JP19810084475U
申请日期
1981.06.09
申请人
发明人
分类号
B21B31/24;(IPC1-7):B21B31/24
主分类号
B21B31/24
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