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经营范围
发明名称
Perfectionnements aux tranchées de protection contre les raids d'avions, etc.
摘要
申请公布号
FR859575(A)
申请公布日期
1940.12.21
申请号
FRD859575
申请日期
1939.08.29
申请人
发明人
HUGHES HUGH, IORYS
分类号
E04H9/12
主分类号
E04H9/12
代理机构
代理人
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