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发明名称
摘要
申请公布号
JPS56169030(U)
申请公布日期
1981.12.14
申请号
JP19800067965U
申请日期
1980.05.16
申请人
发明人
分类号
E04D13/068;(IPC1-7):E04D13/06
主分类号
E04D13/068
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代理人
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