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经营范围
发明名称
Perfectionnements aux appareils de navigation aérienne
摘要
申请公布号
FR676480(A)
申请公布日期
1930.02.24
申请号
FRD676480
申请日期
1929.06.10
申请人
发明人
DRING THOMAS AUGUSTUS
分类号
B64C39/00
主分类号
B64C39/00
代理机构
代理人
主权项
地址
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