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发明名称
Dispositif pour l'obtention de signaux acoustiques, par exemple de signaux protecteurs à air
摘要
申请公布号
FR843779(A)
申请公布日期
1939.07.10
申请号
FRD843779
申请日期
1938.09.22
申请人
TELEFUNKEN GESELLSCHAFT FU:R DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
分类号
G10H5/10
主分类号
G10H5/10
代理机构
代理人
主权项
地址
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