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发明名称
摘要
申请公布号
JPS4932021(Y1)
申请公布日期
1974.08.29
申请号
JP19690104702U
申请日期
1969.11.06
申请人
发明人
分类号
E04B2/00;E04C2/52;(IPC1-7):E04C2/52
主分类号
E04B2/00
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