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发明名称
Sirene zur Erzeugung von zwei verschiedenen Tonfrequenzen
摘要
申请公布号
DE706252(C)
申请公布日期
1941.06.06
申请号
DE1935S117358D
申请日期
1935.03.03
申请人
SACHSENWERK, LICHT- UND KRAFT-AKT.-GES.
发明人
HARTWAGNER DIPL.-ING. LUDWIG
分类号
G10K7/04
主分类号
G10K7/04
代理机构
代理人
主权项
地址
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