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发明名称
摘要
申请公布号
JPS54175840(U)
申请公布日期
1979.12.12
申请号
JP19780073954U
申请日期
1978.05.31
申请人
发明人
分类号
E21D11/00;E04B1/66;(IPC1-7):E21D11/00
主分类号
E21D11/00
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