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发明名称
摘要
申请公布号
JPS5941276(Y2)
申请公布日期
1984.11.27
申请号
JP19790022646U
申请日期
1979.02.22
申请人
发明人
分类号
E21D9/12;(IPC1-7):E21D9/12
主分类号
E21D9/12
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代理人
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