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发明名称
Postes publics d'appel, d'alarme, de signalisation pour demandes de secours immédiat en cas d'accidents et similaires
摘要
申请公布号
FR836598(A)
申请公布日期
1939.01.20
申请号
FRD836598
申请日期
1938.04.13
申请人
发明人
REICHERT HANS
分类号
H04R1/02
主分类号
H04R1/02
代理机构
代理人
主权项
地址
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