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发明名称
élément en béton armé moulé d'avance pour plancher
摘要
申请公布号
FR907455(A)
申请公布日期
1946.03.13
申请号
FRD907455
申请日期
1944.04.20
申请人
发明人
CLET JEAN
分类号
E04B5/06
主分类号
E04B5/06
代理机构
代理人
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