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发明名称
Procédé et éléments de couverture en béton armé
摘要
申请公布号
FR970471(A)
申请公布日期
1951.01.04
申请号
FRD970471
申请日期
1948.08.10
申请人
发明人
LAGUERRE JAMES-LEON
分类号
E04B7/10;E04D3/26
主分类号
E04B7/10
代理机构
代理人
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