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发明名称
Dispositif permettant de déceler ou de révéler l'approche d'un véhicule sur rails
摘要
申请公布号
FR779124(A)
申请公布日期
1935.03.29
申请号
FRD779124
申请日期
1934.09.29
申请人
发明人
PUPIER ANDRE
分类号
B61L29/28
主分类号
B61L29/28
代理机构
代理人
主权项
地址
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