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发明名称
摘要
申请公布号
JPS471922(U)
申请公布日期
1972.08.22
申请号
JP19710001808U
申请日期
1971.01.19
申请人
发明人
分类号
E04C3/04;(IPC1-7):E04C3/04
主分类号
E04C3/04
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代理人
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