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发明名称
Poutre en treillis pour planchers nervurés
摘要
申请公布号
FR1374190(A)
申请公布日期
1964.10.02
申请号
FR19630953727
申请日期
1963.11.14
申请人
发明人
RETT BERND
分类号
E04B5/23;E04C5/065
主分类号
E04B5/23
代理机构
代理人
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地址
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