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发明名称
Installation électrique de sécurité pour les passages à niveau des chemins de fer
摘要
申请公布号
FR758341(A)
申请公布日期
1934.01.15
申请号
FRD758341
申请日期
1932.10.14
申请人
发明人
HOPPE OSCAR
分类号
B61L29/22
主分类号
B61L29/22
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代理人
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