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发明名称
摘要
申请公布号
JPS6013920(Y2)
申请公布日期
1985.05.02
申请号
JP19790058834U
申请日期
1979.05.04
申请人
发明人
分类号
E21D15/44;(IPC1-7):E21D15/44
主分类号
E21D15/44
代理机构
代理人
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