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发明名称
摘要
申请公布号
BE726310(A)
申请公布日期
1969.05.29
申请号
BED726310
申请日期
1968.12.31
申请人
发明人
分类号
E04C2/292;E04C2/32;E04D3/35
主分类号
E04C2/292
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代理人
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地址
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