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发明名称
摘要
申请公布号
JPS57116307(U)
申请公布日期
1982.07.19
申请号
JP19810192541U
申请日期
1981.12.25
申请人
发明人
分类号
B21B39/20;(IPC1-7):B21B39/20
主分类号
B21B39/20
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代理人
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地址
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