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发明名称
Installation de transmission à fréquence musicale codée pour voies ferrées
摘要
申请公布号
CH328954(A)
申请公布日期
1958.03.31
申请号
CHD328954
申请日期
1955.05.13
申请人
COMPAGNIE DE SIGNAUX ET D'ENTREPRISES ELECTRIQUES S. A.
发明人
分类号
B61L1/18
主分类号
B61L1/18
代理机构
代理人
主权项
地址
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