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发明名称
摘要
申请公布号
JPS52162734(U)
申请公布日期
1977.12.09
申请号
JP19760071441U
申请日期
1976.06.04
申请人
发明人
分类号
E04F21/18;(IPC1-7):E04F21/18
主分类号
E04F21/18
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