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发明名称
Dispositif pour la navigation par mauvaise visibilité, notamment pour aéronefs
摘要
申请公布号
FR719411(A)
申请公布日期
1932.02.05
申请号
FRD719411
申请日期
1931.07.02
申请人
发明人
JUNKERS HUGO
分类号
B64D47/02
主分类号
B64D47/02
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代理人
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