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发明名称
摘要
申请公布号
DE2107978(A1)
申请公布日期
1971.12.09
申请号
DE19712107978
申请日期
1971.02.19
申请人
发明人
分类号
E04B1/61;E04B2/74;E04C2/20;E04C2/34;E04C2/40;(IPC1-7):E04B2/00
主分类号
E04B1/61
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代理人
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地址
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