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发明名称
Perfectionnements aux hélicoptères et aux appareils volants à ailes tournantes
摘要
申请公布号
FR787507(A)
申请公布日期
1935.09.24
申请号
FRD787507
申请日期
1935.03.18
申请人
发明人
COATS AUDREY GRETCHEN;HAFNER RAOUL
分类号
B64C27/54
主分类号
B64C27/54
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代理人
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