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发明名称
Dispositif électromagnétique de signalisation
摘要
申请公布号
FR930976(A)
申请公布日期
1948.02.10
申请号
FRD930976
申请日期
1946.04.26
申请人
发明人
RACZ ALEXANDRE-ETIENNE
分类号
G08B13/24;H01J1/28
主分类号
G08B13/24
代理机构
代理人
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