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发明名称
Perfectionnements à la signalisation ferroviaire et analogues
摘要
申请公布号
FR1120555(A)
申请公布日期
1956.07.09
申请号
FRD1120555
申请日期
1955.01.17
申请人
TELECOMMUNICATIONS RADIOELECTRIQUES ET TELEPHONIQUES
发明人
分类号
B61L23/16
主分类号
B61L23/16
代理机构
代理人
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