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发明名称
Perfectionnements aux panneaux absorbant les bruits
摘要
申请公布号
FR997024(A)
申请公布日期
1951.12.31
申请号
FRD997024
申请日期
1949.10.07
申请人
发明人
BOURGEOIS CHARLES
分类号
E04B1/74;E04B1/84;E04B1/86
主分类号
E04B1/74
代理机构
代理人
主权项
地址
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